Add Langfuse integration to app

[devin-ai-integration]

Issue

• resolve:

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Testing Verification

What was done

pr_agent:summary

Detailed Changes

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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: f3a7ea9

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Name	Status	Preview	Comments	Updated (UTC)
liam-app	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 25, 2025 0:57am
liam-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 25, 2025 0:57am
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[devin-ai-integration]

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[supabase]

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

Deployments	Status	Updated
Database	✅	Tue, 25 Mar 2025 00:49:21 UTC
Services	✅	Tue, 25 Mar 2025 00:49:21 UTC
APIs	✅	Tue, 25 Mar 2025 00:49:21 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	✅	Tue, 25 Mar 2025 00:49:34 UTC
Migrations	✅	Tue, 25 Mar 2025 00:49:35 UTC
Seeding	✅	Tue, 25 Mar 2025 00:49:35 UTC
Edge Functions	✅	Tue, 25 Mar 2025 00:49:35 UTC

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CI Feedback 🧐

(Feedback updated until commit 85fa919)

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 install command could not be executed with the --frozen-lockfile flag. The lockfile (pnpm-lock.yaml) is out of date compared to the package.json file in the frontend/apps/app directory. Specifically, the package langfuse-langchain version 3.36.0 is present in the package.json but not in the lockfile. This mismatch prevents the installation from proceeding in frozen lockfile mode, which is typically enforced in CI environments.

Relevant error logs: 1: ##[group]Operating System 2: Ubuntu ... 167: Cache Size: ~388 MB (406427495 B) 168: [command]/usr/bin/tar -xf /home/runner/work/_temp/446f3d6e-bbb4-48f3-b752-c3fe6d26dfd8/cache.tzst -P -C /home/runner/work/liam/liam --use-compress-program unzstd 169: Cache restored successfully 170: Cache restored from key: node-cache-Linux-x64-pnpm-981845ee42f88851b38a0e5b5459c41fdd02ed05a02542dfeb8e5613a229895b 171: ##[group]Run pnpm install --frozen-lockfile --prefer-offline 172: �[36;1mpnpm install --frozen-lockfile --prefer-offline�[0m 173: shell: /usr/bin/bash --noprofile --norc -e -o pipefail {0} 174: env: 175: PNPM_HOME: /home/runner/setup-pnpm/node_modules/.bin 176: ##[endgroup] 177: Scope: all 12 workspace projects 178: ERR_PNPM_OUTDATED_LOCKFILE  Cannot install with "frozen-lockfile" because pnpm-lock.yaml is not up to date with frontend/apps/app/package.json 179: 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" 180: Failure reason: 181: 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":"15.2.3","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":"15.2.3","react":"18.3.1","react-dom":"18","ts-pattern":"5.4.0","valibot":"^1.0.0-beta.5"}) 182: ##[error]Process completed with exit code 1. 183: Post job cleanup.

[hoshinotsuyoshi]

I confirmed it works

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

[hoshinotsuyoshi]

LGTM!

[MH4GF]

I will merge next Monday!

[MH4GF]

to devin: Please resolve conflict.