ci: Re-enable Coverage

'contents' appears to be required for the coverage action. I've enabled
this on a couple of other repos and this appears to work.

.github/workflows/coverage-build.yml

@@ -0,0 +1,35 @@
+name: Build Coverage
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  coverage-build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: netkan
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+          cache: pip
+          cache-dependency-path: netkan/setup.py
+      - name: Install test dependencies
+        run: pip install .[test]
+      - name: force our git config
+        run: cp .gitconfig ~/.
+      - name: Run Coverage
+        run: |
+          coverage run -m pytest
+          coverage xml
+      - name: Upload Coverage
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage.xml
+          path: netkan/coverage.xml
+          retention-days: 1

.github/workflows/coverage-report.yml

@@ -0,0 +1,28 @@
+name: Report Coverage
+
+on:
+  workflow_run:
+    workflows: ["Build Coverage"]
+    types:
+      - completed
+
+permissions:
+  actions: read
+  contents: read
+  pull-requests: write
+
+jobs:
+  coverage-report:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          name: coverage.xml
+          run-id: ${{ github.event.workflow_run.id }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Get Cover
+        uses: techman83/coverage@feat/workflow_run
+        with:
+          coverageFile: coverage.xml
+          token: ${{ secrets.GITHUB_TOKEN }}