feat(core): Support stream responses and tool calls for Google GenAI

[RulaKhaled]

✅ This PR depends on #17625 and it should be reviewed only after that one is merged.

This PR adds:

1. Streaming support for Google GenAI sdk instrumenting the following methods:

   1. Models API Streaming

      • models.generateContentStream() - Stream content generation with real-time chunks

   2. Chat API Streaming (chats.create)

      • chat.sendMessageStream() - Stream chat responses with conversation context

2. New tool calls attributes

   • GEN_AI_REQUEST_AVAILABLE_TOOLS_ATTRIBUTE - Captures available tools from requests
   • GEN_AI_RESPONSE_TOOL_CALLS_ATTRIBUTE - Captures function calls from responses

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	24.23 kB	-	-
@sentry/browser - with treeshaking flags	22.74 kB	-	-
@sentry/browser (incl. Tracing)	40.34 kB	-	-
@sentry/browser (incl. Tracing, Replay)	78.72 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	68.38 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	83.39 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	95.59 kB	-	-
@sentry/browser (incl. Feedback)	40.95 kB	-	-
@sentry/browser (incl. sendFeedback)	28.88 kB	-	-
@sentry/browser (incl. FeedbackAsync)	33.8 kB	-	-
@sentry/react	25.94 kB	-	-
@sentry/react (incl. Tracing)	42.32 kB	-	-
@sentry/vue	28.72 kB	-	-
@sentry/vue (incl. Tracing)	42.14 kB	-	-
@sentry/svelte	24.25 kB	-	-
CDN Bundle	25.74 kB	-	-
CDN Bundle (incl. Tracing)	40.16 kB	-	-
CDN Bundle (incl. Tracing, Replay)	76.38 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback)	81.88 kB	-	-
CDN Bundle - uncompressed	75.23 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	118.89 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	234.01 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	246.78 kB	-	-
@sentry/nextjs (client)	44.34 kB	-	-
@sentry/sveltekit (client)	40.76 kB	-	-
@sentry/node-core	49.98 kB	-	-
@sentry/node	152.72 kB	+0.36%	+536 B 🔺
@sentry/node - without tracing	91.88 kB	-	-
@sentry/aws-serverless	105.33 kB	-	-

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	9,307	-	8,789	+6%
GET With Sentry	1,438	15%	1,360	+6%
GET With Sentry (error only)	6,127	66%	5,924	+3%
POST Baseline	1,215	-	1,201	+1%
POST With Sentry	528	43%	516	+2%
POST With Sentry (error only)	1,045	86%	1,035	+1%
MYSQL Baseline	3,297	-	3,265	+1%
MYSQL With Sentry	493	15%	433	+14%
MYSQL With Sentry (error only)	2,678	81%	2,673	+0%

View base workflow run