feat(fastapi): Add http.route attribute

[alexander-alderman-webb]

Description

Set the http.route attribute on the ASGI server span in patches for FastAPI endpoints.

Add the _server_segment_span field on the Scope class so HTTP framework integrations have a reference to the server span. The reference is used to set the parametrized route as the http.route attribute.

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 📊

✅ 125599 passed | ⏭️ 6763 skipped | Total: 132362 | Pass Rate: 94.89% | Execution Time: 451m 47s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📈 +692
Passed Tests	📈 +696
Failed Tests	📉 -4
Skipped Tests	—

➖ Removed Tests (4)

View removed tests

• test_cache_spans_decorator[True]
  • File: tests.integrations.django.test_cache_module
• test_continuous_profiler_auto_start_and_stop_sampled[experiment-thread]
  • File: tests.profiler.test_continuous_profiler
• test_continuous_profiler_auto_start_and_stop_sampled[non-experiment-gevent]
  • File: tests.profiler.test_continuous_profiler
• test_continuous_profiler_auto_start_and_stop_sampled_span_streaming[experiment-thread]
  • File: tests.profiler.test_continuous_profiler

All tests are passing successfully.

✅ Patch coverage is 95.65%. Project has 2492 uncovered lines.
✅ Project coverage is 90.29%. Comparing base (base) to head (head).

Files with missing lines (2)

File	Patch %	Lines
sentry_sdk/integrations/fastapi.py	100.00%	⚠️ 3 partials
sentry_sdk/integrations/asgi.py	50.00%	⚠️ 1 Missing

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
+ Coverage    90.27%    90.29%    +0.02%
==========================================
  Files          193       193         —
  Lines        25649     25658        +9
  Branches      9454      9454         —
==========================================
+ Hits         23153     23166       +13
- Misses        2496      2492        -4
- Partials      1443      1444        +1

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Generated by Codecov Action

[sentrivana]

Other ASGI integrations to follow? (And WSGI?)

[alexander-alderman-webb]

Yes, tackling them now