docs: Document transaction_style removal

[alexander-alderman-webb]

Description

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 📊

✅ 57782 passed | ❌ 1 failed | ⏭️ 2723 skipped | Total: 60506 | Pass Rate: 95.5% | Execution Time: 162m 17s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📉 -79507
Passed Tests	📉 -75011
Failed Tests	📈 +1
Skipped Tests	📉 -4497

➕ New Tests (1)

View new tests

• test_cache_spans_item_size
  • File: tests.integrations.django.test_cache_module
  • Status: ❌ Failing

❌ Failed Tests

test_cache_spans_item_size

File: tests.integrations.django.test_cache_module
Suite: py3.10-django-v5.2.17
Error: tests/integrations/django/test_cache_module.py:546: in test_cache_spans_item_size assert not spans[0]["attributes"]["cache.hit"] E assert not True

Stack Trace

tests/integrations/django/test_cache_module.py:546: in test_cache_spans_item_size
    assert not spans[0]["attributes"]["cache.hit"]
E   assert not True

✅ Patch coverage is 100.00%. Project has 2062 uncovered lines.
❌ Project coverage is 90.12%. Comparing base (776ace5) to head (02d4b99).

Coverage diff

@@            Coverage Diff             @@
##        master       #PR       +/-##
==========================================
- Coverage    90.37%    90.12%    -0.25%
==========================================
  Files          199       185       -14
  Lines        26526     20875     -5651
  Branches      9866      7260     -2606
==========================================
+ Hits         23971     18813     -5158
- Misses        2555      2062      -493
- Partials      1495      1205      -290

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