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 📊

✅ 282 passed | Total: 282 | Pass Rate: 100% | Execution Time: 42.26s

All tests are passing successfully.

❌ Patch coverage is 3.57%. Project has 15085 uncovered lines.

Files with missing lines (1)

File	Patch %	Lines
langgraph.py	5.17%	⚠️ 257 Missing

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