feat(langgraph): Support span streaming

[alexander-alderman-webb]

Note: Depends on #6405

Description

Use sentry_sdk.traces.start_span and replace Span.set_data() with StreamedSpan.set_attribute() when in span streaming mode.

Do not create spans for StateGraph.compile when the streaming trace lifecycle is configured.

Parametrize tests on the trace lifecycle option.

Issues

Closes #6032

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

[github-actions]

Codecov Results 📊

✅ 2206 passed | ⏭️ 153 skipped | Total: 2359 | Pass Rate: 93.51% | Execution Time: 4m 51s

📊 Comparison with Base Branch

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

✨ No test changes detected

All tests are passing successfully.

❌ Patch coverage is 0.00%. Project has 13412 uncovered lines.
❌ Project coverage is 41.13%. Comparing base (base) to head (head).

Files with missing lines (1)

File	Patch %	Lines
sentry_sdk/integrations/langgraph.py	0.00%	⚠️ 23 Missing

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
- Coverage    41.16%    41.13%    -0.03%
==========================================
  Files          190       190         —
  Lines        22751     22784       +33
  Branches      7778      7788       +10
==========================================
+ Hits          9366      9372        +6
- Misses       13385     13412       +27
- Partials       507       507         —

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