Add Langfuse integration to app

[devin-ai-integration]

Issue

• resolve:

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Testing Verification

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pr_agent:summary

Detailed Changes

pr_agent:walkthrough

Additional Notes

Implements Langfuse integration in the app to track LLM calls, similar to how it's implemented in migration-web.

Link to Devin run: https://app.devin.ai/sessions/5ff355a737c8445bb7b88133c09a62c5
Requested by: hirotaka.miyagi@route06.co.jp

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Latest commit: a9004c8

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[devin-ai-integration]

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[supabase]

Updates to Preview Branch (devin/1742543457-langfuse-integration) ↗︎

Deployments	Status	Updated
Database	✅	Fri, 21 Mar 2025 09:14:37 UTC
Services	✅	Fri, 21 Mar 2025 09:14:37 UTC
APIs	✅	Fri, 21 Mar 2025 09:14:37 UTC

Tasks are run on every commit but only new migration files are pushed.
Close and reopen this PR if you want to apply changes from existing seed or migration files.

Tasks	Status	Updated
Configurations	✅	Fri, 21 Mar 2025 09:14:37 UTC
Migrations	✅	Fri, 21 Mar 2025 09:14:37 UTC
Seeding	✅	Fri, 21 Mar 2025 09:14:37 UTC
Edge Functions	✅	Fri, 21 Mar 2025 09:14:37 UTC

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[qodo-merge-pro-for-open-source]

CI Feedback 🧐

(Feedback updated until commit b40e732)

A test triggered by this PR failed. Here is an AI-generated analysis of the failure:

Action: frontend-ci

Failed stage: Run /./.github/actions/pnpm-setup [❌]

Failure summary: The action failed because the pnpm-lock.yaml file is out of sync with the frontend/apps/app/package.json file. The CI is running with the --frozen-lockfile flag (which is default in CI environments), but the lockfile doesn't match the dependencies specified in package.json. Specifically, the error shows that the package langfuse-langchain version 3.36.0 is present in package.json but not in the lockfile. This indicates that someone added this dependency but didn't update the lockfile.

Relevant error logs: 1: ##[group]Operating System 2: Ubuntu ... 164: Cache Size: ~400 MB (419869780 B) 165: [command]/usr/bin/tar -xf /home/runner/work/_temp/29164e07-c36f-4177-86ed-79778941490a/cache.tzst -P -C /home/runner/work/liam/liam --use-compress-program unzstd 166: Cache restored successfully 167: Cache restored from key: node-cache-Linux-x64-pnpm-54390409b596918c23cf4d15277b25e541acf18027242b5ca51fb4345c16cf14 168: ##[group]Run pnpm install --frozen-lockfile --prefer-offline 169: �[36;1mpnpm install --frozen-lockfile --prefer-offline�[0m 170: shell: /usr/bin/bash --noprofile --norc -e -o pipefail {0} 171: env: 172: PNPM_HOME: /home/runner/setup-pnpm/node_modules/.bin 173: ##[endgroup] 174: Scope: all 12 workspace projects 175: ERR_PNPM_OUTDATED_LOCKFILE  Cannot install with "frozen-lockfile" because pnpm-lock.yaml is not up to date with frontend/apps/app/package.json 176: Note that in CI environments this setting is true by default. If you still need to run install in such cases, use "pnpm install --no-frozen-lockfile" 177: Failure reason: 178: specifiers in the lockfile ({"@langchain/core":"0.3.42","@langchain/openai":"0.4.4","@liam-hq/db":"workspace:*","@liam-hq/db-structure":"workspace:*","@liam-hq/erd-core":"workspace:*","@liam-hq/ui":"workspace:*","@next/third-parties":"15.1.5","@octokit/auth-app":"6.1.3","@octokit/rest":"20.0.2","@prisma/client":"6.4.1","@sentry/nextjs":"8","@trigger.dev/build":"3.3.17","@trigger.dev/sdk":"3.3.17","cheerio":"1.0.0","date-fns":"4.1.0","dotenv":"16.4.7","flags":"3.1.1","minimatch":"10.0.1","next":"15.1.2","react":"18.3.1","react-dom":"18","ts-pattern":"5.4.0","valibot":"^1.0.0-beta.5","@biomejs/biome":"1.9.3","@octokit/openapi-types":"24.0.0","@prisma/nextjs-monorepo-workaround-plugin":"6.5.0","@types/gtag.js":"0.0.20","@types/node":"22.9.0","@types/react":"18","@types/react-dom":"18","esbuild":"0.25.1","trigger.dev":"3.3.17","typed-css-modules":"0.9.1","typescript":"5","vitest":"3.0.8"}) don't match specs in package.json ({"@biomejs/biome":"1.9.3","@octokit/openapi-types":"24.0.0","@prisma/nextjs-monorepo-workaround-plugin":"6.5.0","@types/gtag.js":"0.0.20","@types/node":"22.9.0","@types/react":"18","@types/react-dom":"18","esbuild":"0.25.1","trigger.dev":"3.3.17","typed-css-modules":"0.9.1","typescript":"5","vitest":"3.0.8","@langchain/core":"0.3.42","@langchain/openai":"0.4.4","@liam-hq/db":"workspace:*","@liam-hq/db-structure":"workspace:*","@liam-hq/erd-core":"workspace:*","@liam-hq/ui":"workspace:*","@next/third-parties":"15.1.5","@octokit/auth-app":"6.1.3","@octokit/rest":"20.0.2","@prisma/client":"6.4.1","@sentry/nextjs":"8","@trigger.dev/build":"3.3.17","@trigger.dev/sdk":"3.3.17","cheerio":"1.0.0","date-fns":"4.1.0","dotenv":"16.4.7","flags":"3.1.1","langfuse-langchain":"3.36.0","minimatch":"10.0.1","next":"15.1.2","react":"18.3.1","react-dom":"18","ts-pattern":"5.4.0","valibot":"^1.0.0-beta.5"}) 179: ##[error]Process completed with exit code 1. 180: Post job cleanup.

[hoshinotsuyoshi]

I confirmed it works

pnpm --filter @liam-hq/app trigger:dev

[hoshinotsuyoshi]

LGTM!

[MH4GF]

I will merge next Monday!