feat: Set the segment name on the scope with NoOpStreamedSpan

[alexander-alderman-webb]

Description

Add the name parameter to NoOpStreamedSpan.__init__().

Set the transaction name on the scope when a segment NoOpStreamedSpan is set on the scope.

The commit 11c1e90 removed validation of tracing without performance, so I've added a new test where tracing is disabled.

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 27s

📊 Comparison with Base Branch

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

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 2485 uncovered lines.
❌ Project coverage is 90.12%. Comparing base (base) to head (head).

Files with missing lines (1)

File	Patch %	Lines
sentry_sdk/scope.py	100.00%	⚠️ 1 partials

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
- Coverage    90.15%    90.12%    -0.03%
==========================================
  Files          193       193         —
  Lines        25147     25153        +6
  Branches      9136      9140        +4
==========================================
+ Hits         22669     22668        -1
- Misses        2478      2485        +7
- Partials      1431      1431         —

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[sentrivana]

Looks good, just one question.

[sentrivana]

I assume we can't use the existing _name slot for this?

[alexander-alderman-webb]

The parent _name is typed as str, and all the __init__ parameters are optional for NoOpStreamedSpan.

[sentrivana]

Don't we do something similar for scope though? In the parent class it's not optional, but in NoOpStreamedSpan it is, and it uses the same slot.

I guess that's what the # type: ignore[assignment] is there for. TBH I'd prefer we do the same with _name to keep stuff consistent.

[alexander-alderman-webb]

I don't mind, fair to follow the existing pattern: f4986d9