test(quart): Fix flake caused by flushing the span batcher on segment end

[alexander-alderman-webb]

Description

The background flush on segment end is asynchronous.

The error is

=================================== FAILURES ===================================
_ test_span_streaming_quart_auth_user_id_data_collection[dc_default_user_info] _
tests/integrations/quart/test_quart.py:1223: in test_span_streaming_quart_auth_user_id_data_collection
    assert segment["attributes"]["user.id"] == "42"
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E   KeyError: 'user.id'

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 📊

✅ 112463 passed | ⏭️ 6759 skipped | Total: 119222 | Pass Rate: 94.33% | Execution Time: 394m 59s

📊 Comparison with Base Branch

Metric	Change
Total Tests	—
Passed Tests	—
Failed Tests	—
Skipped Tests	—

✨ No test changes detected

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 2485 uncovered lines.
❌ Project coverage is 90.2%. Comparing base (base) to head (head).

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
- Coverage    90.22%    90.20%    -0.02%
==========================================
  Files          193       193         —
  Lines        25361     25361         —
  Branches      9302      9302         —
==========================================
+ Hits         22880     22876        -4
- Misses        2481      2485        +4
- Partials      1436      1432        -4

---

Generated by Codecov Action