diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 9c00339b..73efd682 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -15,3 +15,8 @@ updates:
     directory: "/"
     schedule: { interval: "weekly" }
     labels: [ "dependencies", "gh-actions" ]
+
+  - package-ecosystem: docker
+    directory: /
+    schedule:
+      interval: daily
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d4627f20..ec278f50 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,10 +24,15 @@ jobs:
             coverage: true
 
     steps:
-    - uses: actions/checkout@v4
+    - name: Harden the runner (Audit all outbound calls)
+      uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+      with:
+        egress-policy: audit
+
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -37,7 +42,7 @@ jobs:
       run: echo "dir=$(python -m pip cache dir)" >> "$GITHUB_OUTPUT"
 
     - name: Cache pip
-      uses: actions/cache@v4
+      uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
       with:
         path: ${{ steps.pip-cache.outputs.dir }}
         key: ${{ runner.os }}-pip-${{ hashFiles('pyproject.toml') }}
@@ -64,7 +69,7 @@ jobs:
 
     - name: Upload coverage to Codecov
       if: ${{ matrix.coverage == true }}
-      uses: codecov/codecov-action@v5
+      uses: codecov/codecov-action@18283e04ce6e62d37312384ff67231eb8fd56d24 # v5.4.3
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         files: coverage.xml
@@ -74,5 +79,5 @@ jobs:
         verbose: true
 
     - name: Run pre-commit hooks
-      uses: pre-commit/action@v3.0.1
+      uses: pre-commit/action@2c7b3805fd2a0fd8c1884dcaebf91fc102a13ecd # v3.0.1
       if: ${{ matrix.python-version == '3.13' && matrix.os == 'ubuntu-latest' }}
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 00000000..ca0a0578
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,78 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: ["main"]
+  schedule:
+    - cron: "0 0 * * 1"
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ["javascript", "python"]
+        # CodeQL supports [ $supported-codeql-languages ]
+        # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
+
+    steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        with:
+          egress-policy: audit
+
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@181d5eefc20863364f96762470ba6f862bdef56b # v3.29.2
+        with:
+          languages: ${{ matrix.language }}
+          # If you wish to specify custom queries, you can do so here or in a config file.
+          # By default, queries listed here will override any specified in a config file.
+          # Prefix the list here with "+" to use these queries and those in the config file.
+
+      # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below)
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@181d5eefc20863364f96762470ba6f862bdef56b # v3.29.2
+
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+
+      #   If the Autobuild fails above, remove it and uncomment the following three lines.
+      #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
+
+      # - run: |
+      #   echo "Run, Build Application using script"
+      #   ./location_of_script_within_repo/buildscript.sh
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@181d5eefc20863364f96762470ba6f862bdef56b # v3.29.2
+        with:
+          category: "/language:${{matrix.language}}"
diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
new file mode 100644
index 00000000..71ddc655
--- /dev/null
+++ b/.github/workflows/dependency-review.yml
@@ -0,0 +1,27 @@
+# Dependency Review Action
+#
+# This Action will scan dependency manifest files that change as part of a Pull Request,
+# surfacing known-vulnerable versions of the packages declared or updated in the PR.
+# Once installed, if the workflow run is marked as required,
+# PRs introducing known-vulnerable packages will be blocked from merging.
+#
+# Source repository: https://github.com/actions/dependency-review-action
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        with:
+          egress-policy: audit
+
+      - name: 'Checkout Repository'
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@da24556b548a50705dd671f47852072ea4c105d9 # v4.7.1
diff --git a/.github/workflows/docker_image.yml b/.github/workflows/docker_image.yml
index ad555e80..aa758a04 100644
--- a/.github/workflows/docker_image.yml
+++ b/.github/workflows/docker_image.yml
@@ -26,6 +26,9 @@ env:
        )
     }}
 
+permissions:
+  contents: read
+
 jobs:
   docker-build:
     runs-on: ubuntu-latest
@@ -35,7 +38,12 @@ jobs:
       attestations: write
       id-token: write
     steps:
-      - uses: actions/checkout@v4
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Set current timestamp
         id: vars
@@ -44,7 +52,7 @@ jobs:
           echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
 
       - name: Log in to the Container registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
@@ -52,7 +60,7 @@ jobs:
 
       - name: Docker Meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5.7.0
         with:
           images: |
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
@@ -65,13 +73,13 @@ jobs:
             type=ref,event=pr,suffix=-${{ steps.vars.outputs.sha_short }}-${{ steps.vars.outputs.timestamp }}
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3.6.0
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
 
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
         id: push
         with:
           context: .
@@ -84,7 +92,7 @@ jobs:
 
       - name: Generate artifact attestation
         if: github.event_name != 'pull_request' || env.PUSH_FROM_PR == 'true'
-        uses: actions/attest-build-provenance@v2
+        uses: actions/attest-build-provenance@e8998f949152b193b063cb0ec769d69d929409be # v2.4.0
         with:
           subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
           subject-digest: ${{ steps.push.outputs.digest }}
diff --git a/.github/workflows/pr-title-check.yml b/.github/workflows/pr-title-check.yml
index e4f482a6..11b2b149 100644
--- a/.github/workflows/pr-title-check.yml
+++ b/.github/workflows/pr-title-check.yml
@@ -8,8 +8,13 @@ jobs:
   validate-pr-title:
     runs-on: ubuntu-latest
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        with:
+          egress-policy: audit
+
       - name: PR Conventional Commit Validation
-        uses:  ytanikin/pr-conventional-commits@1.4.1
+        uses:  ytanikin/pr-conventional-commits@8267db1bacc237419f9ed0228bb9d94e94271a1d # 1.4.1
         with:
           task_types: '["feat","fix","docs","test","ci","refactor","perf","chore","revert"]'
           add_label: 'false'
diff --git a/.github/workflows/publish_to_pypi.yml b/.github/workflows/publish_to_pypi.yml
index 0f5374e0..6db9140e 100644
--- a/.github/workflows/publish_to_pypi.yml
+++ b/.github/workflows/publish_to_pypi.yml
@@ -13,10 +13,15 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Set up Python 3.13
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.13"
           cache: pip
@@ -28,7 +33,7 @@ jobs:
           python -m pip install build twine
           twine check dist/*
       - name: Upload dist artefact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: dist
           path: dist/
@@ -43,11 +48,16 @@ jobs:
       id-token: write # OIDC token for trusted publishing
 
     steps:
-      - uses: actions/download-artifact@v4
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        with:
+          egress-policy: audit
+
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: dist
           path: dist/
 
-      - uses: pypa/gh-action-pypi-publish@release/v1
+      - uses: pypa/gh-action-pypi-publish@76f52bc884231f62b9a034ebfe128415bbaabdfc # release/v1
         with:
           verbose: true
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index 75ed1ef4..7d420d31 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -21,6 +21,11 @@ jobs:
       id-token: write # publish results for the badge
 
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        with:
+          egress-policy: audit
+
       - name: Checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
         with:
@@ -34,6 +39,6 @@ jobs:
           publish_results: true  # enables the public badge
 
       - name: Upload to code-scanning
-        uses: github/codeql-action/upload-sarif@v3
+        uses: github/codeql-action/upload-sarif@181d5eefc20863364f96762470ba6f862bdef56b # v3.29.2
         with:
           sarif_file: results.sarif
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f2d0072a..949bc013 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -154,3 +154,7 @@ repos:
     hooks:
       - id: check-hooks-apply
       - id: check-useless-excludes
+  - repo: https://github.com/gitleaks/gitleaks
+    rev: v8.16.3
+    hooks:
+      - id: gitleaks
diff --git a/Dockerfile b/Dockerfile
index 1fb2357f..5c3bc3cc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Stage 1: Install Python dependencies
-FROM python:3.13-slim AS python-builder
+FROM python:3.13-slim@sha256:6544e0e002b40ae0f59bc3618b07c1e48064c4faed3a15ae2fbd2e8f663e8283 AS python-builder
 
 WORKDIR /build
 
@@ -16,7 +16,7 @@ RUN set -eux; \
     pip install --no-cache-dir --timeout 1000 .
 
 # Stage 2: Runtime image
-FROM python:3.13-slim
+FROM python:3.13-slim@sha256:6544e0e002b40ae0f59bc3618b07c1e48064c4faed3a15ae2fbd2e8f663e8283
 
 ARG UID=1000
 ARG GID=1000