feat(zend): add a per-request sapi activate hook

[ptondereau]

Description

Add ModuleBuilder::sapi_activate_function, which chains sapi_module.activate so a closure gets a copy of the request info at the start of every request, including each FrankenPHP worker request where RINIT does not run again, and can call set_header from there. The hook goes in last at MINIT and is skipped when the user startup fails, comes back out at MSHUTDOWN when it is still the current one, and is refused for dl() modules, which PHP unloads while the SAPI would keep the pointer.

Checklist

• I have read the contribution guidelines and the code of conduct.
• I have added tests that prove my code works as expected.
• I have added documentation if applicable.
• I have added a migration guide if applicable.

[coveralls]

Coverage Report for CI Build 38053984402

Coverage increased (+0.3%) to 75.334%

Details

• Coverage increased (+0.3%) from the base build.
• Patch coverage: 10 uncovered changes across 1 file (107 of 117 lines covered, 91.45%).
• No coverage regressions found.

Uncovered Changes

File	Changed	Covered	%
src/zend/sapi_activate.rs	107	97	90.65%
Total (2 files)	117	107	91.45%

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	15057
Covered Lines:	11343
Line Coverage:	75.33%
Coverage Strength:	52.88 hits per line

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💛 - Coveralls

[codspeed]

Merging this PR will not alter performance

⚠️ 51 benchmarks spent significant time in system calls

System calls cannot be consistently instrumented, so they are not included in the measure, which understates the real cost. Please switch to the Walltime instrument to accurately measure system calls.

Measurement and system calls

• output_transforms[100000]
• object_news[100000]
• exception_throws[100000]
• property_dumps[100000]
• output_transforms[10]
• property_dumps[10]
• binary_slice_reads[10]
• binary_slice_reads[1]
• function_calls[1]
• function_calls[10]
• …and 41 more

✅ 51 untouched benchmarks

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_{Comparing feat/sapi-activate-hook (bf29769) with master (6fcc59b)}