feat: Set segment source on scope for NoOpStreamedSpan

[alexander-alderman-webb]

Description

Add the attributes parameter to NoOpStreamedSpan.__init__().
Add a _segment_source field to NoOpStreamedSpan.

Set the segment source on the scope when a NoOpStreamedSpan is set on the scope.

Issues

Reminders

• Please add tests to validate your changes, and lint your code using uv run ruff.
• 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 📊

✅ 104113 passed | ⏭️ 6677 skipped | Total: 110790 | Pass Rate: 93.97% | Execution Time: 362m 16s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📈 +129
Passed Tests	📈 +129
Failed Tests	—
Skipped Tests	—

All tests are passing successfully.

❌ Patch coverage is 73.33%. Project has 2488 uncovered lines.
❌ Project coverage is 90.11%. Comparing base (base) to head (head).

Files with missing lines (2)

File	Patch %	Lines
sentry_sdk/traces.py	60.00%	⚠️ 4 Missing
sentry_sdk/scope.py	100.00%	⚠️ 2 partials

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
- Coverage    90.14%    90.11%    -0.03%
==========================================
  Files          193       193         —
  Lines        25147     25162       +15
  Branches      9136      9150       +14
==========================================
+ Hits         22669     22674        +5
- Misses        2478      2488       +10
- Partials      1431      1433        +2

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[sentrivana]

Can we directly access the segment attributes to get the source instead of adding a new slot? Right now it's a bit of a hybrid -- I'd either do it exclusively via attributes or exclusively via the new slot, but not both. (Preferring the attributes approach to avoid adding a slot and keeping source handling consistent in StreamedSpan vs NoOpStreamedSpan.)

[alexander-alderman-webb]

I've used _attributes now but only store the sentry.segment.name.source attribute to avoid unnecessary pre-serialization.

[cursor]

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