feat(core): Truncate request messages in AI integrations

[RulaKhaled]

Fixes: #17809

Implements message truncation logic that uses binary search to drop oldest messages first until the payload fits within the 20KB limit. If a single message exceeds the limit, its content is truncated from the end. Supports OpenAI/Anthropic ({ role, content }) and Google GenAI ({ role, parts: [{ text }] }) message formats.

[github-actions]

size-limit report 📦

⚠️ Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

Path	Size	% Change	Change
@sentry/browser	24.48 kB	-	-
@sentry/browser - with treeshaking flags	22.96 kB	-	-
@sentry/browser (incl. Tracing)	40.67 kB	-	-
@sentry/browser (incl. Tracing, Replay)	79.03 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	68.69 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	83.72 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	95.9 kB	-	-
@sentry/browser (incl. Feedback)	41.17 kB	-	-
@sentry/browser (incl. sendFeedback)	29.14 kB	-	-
@sentry/browser (incl. FeedbackAsync)	34.05 kB	-	-
@sentry/react	26.19 kB	-	-
@sentry/react (incl. Tracing)	42.62 kB	-	-
@sentry/vue	28.99 kB	-	-
@sentry/vue (incl. Tracing)	42.44 kB	-	-
@sentry/svelte	24.51 kB	-	-
CDN Bundle	26.7 kB	-	-
CDN Bundle (incl. Tracing)	41.22 kB	-	-
CDN Bundle (incl. Tracing, Replay)	77.53 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback)	82.98 kB	-	-
CDN Bundle - uncompressed	78.33 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	122.33 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	237.49 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	250.25 kB	-	-
@sentry/nextjs (client)	44.71 kB	-	-
@sentry/sveltekit (client)	41.05 kB	-	-
@sentry/node-core	50.8 kB	-	-
@sentry/node	154.92 kB	+0.33%	+502 B 🔺
@sentry/node - without tracing	92.67 kB	-	-
@sentry/aws-serverless	106.38 kB	-	-

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[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.
⚠️ Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

Scenario	Requests/s	% of Baseline	Prev. Requests/s	Change %
GET Baseline	8,975	-	8,966	+0%
GET With Sentry	1,430	16%	1,412	+1%
GET With Sentry (error only)	6,200	69%	6,242	-1%
POST Baseline	1,198	-	1,211	-1%
POST With Sentry	507	42%	531	-5%
POST With Sentry (error only)	1,045	87%	1,089	-4%
MYSQL Baseline	3,277	-	3,373	-3%
MYSQL With Sentry	395	12%	484	-18%
MYSQL With Sentry (error only)	2,745	84%	2,768	-1%

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