feat(data-collection): foundation — option, resolution, accessors

[ericapisani]

Introduces the data_collection init option, A/B/C/D resolution precedence, and the should_collect_* accessors plus the scrubbing primitives (with unit tests).

Behavior-neutral: in legacy mode the resolved DataCollection mirrors send_default_pii, and nothing consumes the new filtering yet — so merging this changes no observed behavior.

Base of the data_collection split. Consumers stack on top:

• frames (stack-frame variables + source context lines)
• http (request data collection)
• genai (AI input/output collection)

[github-actions]

Codecov Results 📊

✅ 90796 passed | ⏭️ 6305 skipped | Total: 97101 | Pass Rate: 93.51% | Execution Time: 313m 25s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📈 +645
Passed Tests	📈 +645
Failed Tests	—
Skipped Tests	—

All tests are passing successfully.

✅ Patch coverage is 88.50%. Project has 2419 uncovered lines.
✅ Project coverage is 89.94%. Comparing base (base) to head (head).

Files with missing lines (3)

File	Patch %	Lines
sentry_sdk/data_collection.py	90.37%	⚠️ 18 Missing and 14 partials
sentry_sdk/client.py	86.67%	⚠️ 4 Missing and 1 partials
sentry_sdk/scope.py	50.00%	⚠️ 4 Missing

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
+ Coverage    89.92%    89.94%    +0.02%
==========================================
  Files          192       193        +1
  Lines        23809     24035      +226
  Branches      8218      8314       +96
==========================================
+ Hits         21409     21616      +207
- Misses        2400      2419       +19
- Partials      1339      1354       +15

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