feat(langchain): Broaden AI provider detection beyond OpenAI and Anthropic

[ericapisani]

Summary

• Extracts a _get_ai_system() helper that generically detects AI providers from LangChain's _type field, replacing hardcoded "anthropic" / "openai" checks.
• Adds support for Cohere, Ollama, Mistral, Fireworks, HuggingFace, Groq, NVIDIA, xAI, DeepSeek, Google, and any future LangChain providers without code changes.

Test plan

• Parametrized test with coverage for real LangChain _llm_type values from various providers
• CI passes

🤖 Generated with Claude Code

[ericapisani]

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Codecov Results 📊

✅ 13 passed | Total: 13 | Pass Rate: 100% | Execution Time: 6.92s

📊 Comparison with Base Branch

Metric	Change
Total Tests	—
Passed Tests	—
Failed Tests	—
Skipped Tests	—

✨ No test changes detected

All tests are passing successfully.

❌ Patch coverage is 0.00%. Project has 14379 uncovered lines.
✅ Project coverage is 30.25%. Comparing base (base) to head (head).

Files with missing lines (1)

File	Patch %	Lines
langchain.py	3.27%	⚠️ 591 Missing

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
+ Coverage    25.33%    30.25%    +4.92%
==========================================
  Files          189       189         —
  Lines        20613     20614        +1
  Branches      6738      6736        -2
==========================================
+ Hits          5222      6235     +1013
- Misses       15391     14379     -1012
- Partials       429       474       +45

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Codecov Results 📊

✅ 9 passed | ⏭️ 1 skipped | Total: 10 | Pass Rate: 90% | Execution Time: 3.63s

All tests are passing successfully.

❌ Patch coverage is 0.00%. Project has 14771 uncovered lines.

Files with missing lines (1)

File	Patch %	Lines
langchain.py	3.24%	⚠️ 598 Missing

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[ericapisani]

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Semver Impact of This PR

🟡 Minor (new features)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

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New Features ✨

• (asgi) Add option to disable suppressing chained exceptions by alexander-alderman-webb in #5714

• (langchain) Broaden AI provider detection beyond OpenAI and Anthropic by ericapisani in #5707

• (logging) Separate ignore lists for events/breadcrumbs and sentry logs by sl0thentr0py in #5698

Bug Fixes 🐛

Anthropic

• Set exception info on streaming span when applicable by alexander-alderman-webb in #5683
• Patch AsyncStream.close() and AsyncMessageStream.close() to finish spans by alexander-alderman-webb in #5675
• Patch Stream.close() and MessageStream.close() to finish spans by alexander-alderman-webb in #5674

Documentation 📚

• Add note on AI PRs to CONTRIBUTING.md by sentrivana in #5696

Internal Changes 🔧

• Add -latest alias for each integration test suite by sentrivana in #5706
• Use date-based branch names for toxgen PRs by sentrivana in #5704
• 🤖 Update test matrix with new releases (03/19) by github-actions in #5703
• Add client report tests for span streaming by sentrivana in #5677

Other

• Update CHANGELOG.md by sentrivana in #5685

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