feat(cloudflare/vercel-edge): Add manual instrumentation for LangGraph

[RulaKhaled]

This PR adds manual instrumentation support for LangGraph StateGraph operations in Cloudflare Workers and Vercel Edge environments.

import * as Sentry from '@sentry/cloudflare'; // or '@sentry/vercel-edge'
import { StateGraph, START, END, MessagesAnnotation } from '@langchain/langgraph';

// Create and instrument the graph
const graph = new StateGraph(MessagesAnnotation)
  .addNode('agent', agentFn)
  .addEdge(START, 'agent')
  .addEdge('agent', END);

Sentry.instrumentLangGraph(graph, {
  recordInputs: true,
  recordOutputs: true,
});

const compiled = graph.compile({ name: 'weather_assistant' });

await compiled.invoke({
  messages: [{ role: 'user', content: 'What is the weather in SF?' }],
});

• This PR depends on feat(core): Instrument LangGraph Agent #18114

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	24.62 kB	-	-
@sentry/browser - with treeshaking flags	23.13 kB	-	-
@sentry/browser (incl. Tracing)	41.28 kB	-	-
@sentry/browser (incl. Tracing, Profiling)	45.61 kB	-	-
@sentry/browser (incl. Tracing, Replay)	79.73 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	69.44 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	84.43 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	96.64 kB	-	-
@sentry/browser (incl. Feedback)	41.29 kB	-	-
@sentry/browser (incl. sendFeedback)	29.29 kB	-	-
@sentry/browser (incl. FeedbackAsync)	34.21 kB	-	-
@sentry/react	26.32 kB	-	-
@sentry/react (incl. Tracing)	43.22 kB	-	-
@sentry/vue	29.11 kB	-	-
@sentry/vue (incl. Tracing)	43.08 kB	-	-
@sentry/svelte	24.64 kB	-	-
CDN Bundle	26.94 kB	-	-
CDN Bundle (incl. Tracing)	41.83 kB	-	-
CDN Bundle (incl. Tracing, Replay)	78.38 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback)	83.85 kB	-	-
CDN Bundle - uncompressed	78.92 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	124.07 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	240.1 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	252.87 kB	-	-
@sentry/nextjs (client)	45.37 kB	-	-
@sentry/sveltekit (client)	41.67 kB	-	-
@sentry/node-core	50.91 kB	-	-
@sentry/node	159.09 kB	-	-
@sentry/node - without tracing	92.78 kB	+0.01%	+1 B 🔺
@sentry/aws-serverless	106.53 kB	-0.01%	-2 B 🔽

View base workflow run

[github-actions]

node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

Scenario	Requests/s	% of Baseline	Prev. Requests/s	Change %
GET Baseline	8,808	-	9,158	-4%
GET With Sentry	1,377	16%	1,276	+8%
GET With Sentry (error only)	6,170	70%	5,987	+3%
POST Baseline	1,179	-	1,166	+1%
POST With Sentry	465	39%	502	-7%
POST With Sentry (error only)	1,059	90%	1,041	+2%
MYSQL Baseline	3,317	-	3,304	+0%
MYSQL With Sentry	429	13%	425	+1%
MYSQL With Sentry (error only)	2,737	83%	2,662	+3%

View base workflow run

[nicohrubec]

LGTM!