ref(mcp): Inline _extract_handler_data_from_args()

[alexander-alderman-webb]

Description

Remove unnecessary indirection.

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 📊

✅ 129901 passed | ❌ 1 failed | ⏭️ 7110 skipped | Total: 137012 | Pass Rate: 94.81% | Execution Time: 469m 16s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📉 -694
Passed Tests	📉 -695
Failed Tests	📈 +1
Skipped Tests	—

➕ New Tests (1)

View new tests

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

❌ Failed Tests

test_cache_spans_item_size[True]

File: tests.integrations.django.test_cache_module
Suite: py3.14-django-v6.1
Error: tests/integrations/django/test_cache_module.py:764: 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:764: in test_cache_spans_item_size
    assert not spans[0]["attributes"]["cache.hit"]
E   assert not True

❌ Patch coverage is 62.96%. Project has 2509 uncovered lines.
✅ Project coverage is 90.24%. Comparing base (692cca2) to head (885ac3b).

Files with missing lines (1)

File	Patch %	Lines
sentry_sdk/integrations/mcp.py	62.96%	⚠️ 10 Missing and 5 partials

Coverage diff

@@            Coverage Diff             @@
##        master       #PR       +/-##
==========================================
+ Coverage    90.24%    90.24%        —%
==========================================
  Files          193       193         —
  Lines        25724     25713       -11
  Branches      9504      9494       -10
==========================================
+ Hits         23214     23204       -10
- Misses        2510      2509        -1
- Partials      1435      1432        -3

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