[codex] Add Anthropic early-close regression coverage

[chocoHacks33]

Summary

• add a regression test for closing an Anthropic streaming response before consuming it to exhaustion
• force stream finalizer cleanup inside the test so the no-error assertion covers the reported cleanup path

Testing

• python -m uv run pytest tests/otel_integrations/test_anthropic.py -q

Closes #1607.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 93039ca1-5d6d-45c1-86d1-b74b555f3953

📥 Commits

Reviewing files that changed from the base of the PR and between b282866 and 1f4be1d.

📒 Files selected for processing (1)

• tests/otel_integrations/test_anthropic.py

🔗 Linked repositories identified

CodeRabbit considers these linked repositories for cross-repo context during reviews:

• pydantic/logfire (manual)
• pydantic/pydantic-ai (manual)
• pydantic/platform (auto-detected)
• pydantic/pydantic (auto-detected)

🚧 Files skipped from review as they are similar to previous changes (1)

• tests/otel_integrations/test_anthropic.py

---

📝 Walkthrough

Walkthrough

Adds an Anthropic integration test for partially consumed synchronous message streams. The test reads the first text delta, deletes the streaming response, triggers garbage collection, and verifies that exactly one chunk was observed without an OpenTelemetry “Failed to detach context” error. It also verifies the expected exported spans. Imports for garbage collection and log capture are added.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: adding regression coverage for Anthropic early-close cleanup behavior.
Description check	✅ Passed	The description is directly related to the test-only change and the cleanup regression it targets.
Linked Issues check	✅ Passed	The new test covers early stream close cleanup and checks for the reported detach-context error path from #1607.
Out of Scope Changes check	✅ Passed	The PR appears limited to targeted test coverage in the Anthropic test file with no unrelated changes.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

_{Comment @coderabbitai help to get the list of available commands.}

[cubic-dev-ai]

No issues found across 1 file

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Re-trigger cubic}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!