feat(Tracing): Add Vercel AI SDK v6 support

[RulaKhaled]

This PR adds support for Vercel AI SDK v6 telemetry changes.

Changes

Provider Metadata Updates

• Added azure key to ProviderMetadata interface for Azure Responses API (v6 uses azure instead of openai for Azure provider)
• Added vertex key for Google Vertex provider (v6 uses vertex instead of google)
• Updated addProviderMetadataToAttributes to check both old and new keys for backward compatibility

V6 Test Suite

• Added integration tests for Vercel AI SDK v6 using MockLanguageModelV3
• Updated mock scenarios to match v6's new data structures:
  • usage now uses object format: { total, noCache, cached }
  • finishReason now uses object format: { unified, raw }
• Added vercel.ai.request.headers.user-agent attribute to test expectations

Closes #18691

[linear]

JS-1399 Support v6 of Vercel AI

[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	9,164	-	8,796	+4%
GET With Sentry	1,664	18%	1,689	-1%
GET With Sentry (error only)	6,109	67%	5,873	+4%
POST Baseline	1,188	-	1,171	+1%
POST With Sentry	573	48%	580	-1%
POST With Sentry (error only)	1,063	89%	1,051	+1%
MYSQL Baseline	3,375	-	3,182	+6%
MYSQL With Sentry	468	14%	427	+10%
MYSQL With Sentry (error only)	2,692	80%	2,606	+3%

View base workflow run

[nicohrubec]

LGTM

[nicohrubec]

just a question: is there any specific reason we set this here?

[RulaKhaled]

not that i know of, this is just copied from v5

[cursor]

Duplicate test case runs the same test twice

Low Severity

The test 'creates ai related spans with v6' at lines 562-576 is an exact duplicate of the test 'creates ai related spans with sendDefaultPii: false' at lines 410-424. Both use the same scenario.mjs, instrument.mjs, EXPECTED_TRANSACTION_DEFAULT_PII_FALSE, and ai: '^6.0.0' dependency. This appears to be leftover code that wastes CI resources by running the identical test suite twice.

Additional Locations (1)

• dev-packages/node-integration-tests/suites/tracing/vercelai/v6/test.ts#L409-L424