fix(node): Include system message in anthropic-ai messages span

[isaacs]

Closes #18331

Closes #18365

[linear]

JS-1223 JS Anthropic AI SDK - gen_ai.request.messages attribute incomplete

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	24.8 kB	-	-
@sentry/browser - with treeshaking flags	23.31 kB	-	-
@sentry/browser (incl. Tracing)	41.54 kB	-	-
@sentry/browser (incl. Tracing, Profiling)	46.13 kB	-	-
@sentry/browser (incl. Tracing, Replay)	79.96 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	69.68 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	84.64 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	96.88 kB	-	-
@sentry/browser (incl. Feedback)	41.48 kB	-	-
@sentry/browser (incl. sendFeedback)	29.49 kB	-	-
@sentry/browser (incl. FeedbackAsync)	34.47 kB	-	-
@sentry/react	26.52 kB	-	-
@sentry/react (incl. Tracing)	43.74 kB	-	-
@sentry/vue	29.25 kB	-	-
@sentry/vue (incl. Tracing)	43.34 kB	-	-
@sentry/svelte	24.82 kB	-	-
CDN Bundle	27.21 kB	-	-
CDN Bundle (incl. Tracing)	42.21 kB	-	-
CDN Bundle (incl. Tracing, Replay)	78.75 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback)	84.2 kB	-	-
CDN Bundle - uncompressed	79.96 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	125.34 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	241.37 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	254.13 kB	-	-
@sentry/nextjs (client)	45.96 kB	-	-
@sentry/sveltekit (client)	41.9 kB	-	-
@sentry/node-core	51.27 kB	+0.01%	+1 B 🔺
@sentry/node	159.53 kB	+0.06%	+86 B 🔺
@sentry/node - without tracing	92.85 kB	-	-
@sentry/aws-serverless	108.14 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.
⚠️ 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	8,807	-	9,041	-3%
GET With Sentry	1,726	20%	1,702	+1%
GET With Sentry (error only)	6,111	69%	6,066	+1%
POST Baseline	1,202	-	1,175	+2%
POST With Sentry	595	50%	571	+4%
POST With Sentry (error only)	1,074	89%	1,021	+5%
MYSQL Baseline	3,402	-	3,261	+4%
MYSQL With Sentry	486	14%	431	+13%
MYSQL With Sentry (error only)	2,764	81%	2,664	+4%

View base workflow run

[RulaKhaled]

I left some comments. Can you please add a description to the issue you're working on? it would be super helpful to see one before diving into the review 🙏

Also, node integration tests are failing, we need to update test expectations to include the new system prompts. Thanks!

[RulaKhaled]

Thanks for making the changes