feat: Send GenAI spans as V2 envelope items

[alexander-alderman-webb]

Description

Issues

Reminders

• Please add tests to validate your changes, and lint your code using tox -e linters.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

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Semver Impact of This PR

🟡 Minor (new features)

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New Features ✨

• (ci) Cancel in-progress PR workflows on new commit push by joshuarli in #5994

• Send GenAI spans as V2 envelope items by alexander-alderman-webb in #6079

Bug Fixes 🐛

• (google_genai) Redact binary data in inline_data and fix multi-part message extraction by ericapisani in #5977
• (profiler) Stop nulling buffer on teardown by ericapisani in #6075

Internal Changes 🔧

• (celery) Remove unused NoOpMgr from utils by sentrivana in #6078
• (pydantic-ai) Remove dead Model.request patch by alexander-alderman-webb in #5956
• (tests) Replace deprecated enable_tracingwith traces_sample_rate by sentrivana in #6077
• Set explicit base-branch for codecov action by ericapisani in #5992

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Codecov Results 📊

✅ 6 passed | Total: 6 | Pass Rate: 100% | Execution Time: 6.52s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📉 -1
Passed Tests	📉 -1
Failed Tests	—
Skipped Tests	—

All tests are passing successfully.

❌ Patch coverage is 19.30%. Project has 16721 uncovered lines.
✅ Project coverage is 22.05%. Comparing base (base) to head (head).

Files with missing lines (1)

File	Patch %	Lines
client.py	45.85%	⚠️ 352 Missing and 68 partials

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
+ Coverage    21.84%    22.05%    +0.21%
==========================================
  Files          190       190         —
  Lines        21351     21452      +101
  Branches      7066      7146       +80
==========================================
+ Hits          4662      4731       +69
- Misses       16689     16721       +32
- Partials       379       388        +9

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Generated by Codecov Action

[sentry-warden]

item_count header may not match actual items due to isinstance filtering

The item_count header is set to len(gen_ai_spans) but the actual items list filters spans with if isinstance(span, dict). If any span in gen_ai_spans is not a dict (e.g., an AnnotatedValue or other type), the header will report more items than are actually present in the payload. This could cause issues with downstream processing that relies on the item_count header being accurate.

Verification

Verified by examining: (1) _split_gen_ai_spans at lines 255-277, which iterates spans and appends to gen_ai_spans list without type checking (it only calls .get() on spans, assuming dict-like behavior); (2) The spans in event_opt["spans"] could potentially contain non-dict types as seen in other parts of the codebase that check for AnnotatedValue. The filtering on line 1127 guards against this but creates a mismatch with the count on line 1118.

Suggested fix: Either filter gen_ai_spans before calculating item_count, or compute item_count from the filtered list.

Suggested change

	"item_count": len(gen_ai_spans),
	},
	payload=PayloadRef(
	json={
	"items": [
	_serialized_v1_span_to_serialized_v2_span(
	span, event
	)
	for span in gen_ai_spans
	if isinstance(span, dict)
	]
	gen_ai_spans = [span for span in gen_ai_spans if isinstance(span, dict)]
	span, event_opt

Identified by Warden find-bugs · BKJ-YKB