Collect incompletely fetched CurlMulti handles upon destruction

[bwoebi]

Make sure to visit each request to try collecting metadata for unfinished requests, in case curl_multi_info_read was not polled to the end.

(Test outstanding.)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.86%. Comparing base (50ce39c) to head (33906f5).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3469      +/-   ##
==========================================
- Coverage   61.90%   61.86%   -0.05%     
==========================================
  Files         142      142              
  Lines       12895    12895              
  Branches     1689     1689              
==========================================
- Hits         7983     7977       -6     
- Misses       4153     4161       +8     
+ Partials      759      757       -2     

see 1 file with indirect coverage changes

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[pr-commenter]

Benchmarks [ tracer ]

Benchmark execution time: 2025-11-04 22:47:00

Comparing candidate commit 33906f5 in PR branch bob/try-collect-curl with baseline commit 50ce39c in branch master.

Found 2 performance improvements and 6 performance regressions! Performance is the same for 186 metrics, 0 unstable metrics.

scenario:ComposerTelemetryBench/benchTelemetryParsing-opcache

• 🟩 execution_time [-1473.287ns; -326.713ns] or [-10.754%; -2.385%]

scenario:MessagePackSerializationBench/benchMessagePackSerialization

• 🟥 execution_time [+2.099µs; +4.101µs] or [+2.036%; +3.976%]

scenario:MessagePackSerializationBench/benchMessagePackSerialization-opcache

• 🟥 execution_time [+3.661µs; +5.559µs] or [+3.474%; +5.275%]

scenario:PDOBench/benchPDOOverhead

• 🟥 execution_time [+10.087µs; +13.943µs] or [+3.873%; +5.354%]

scenario:PDOBench/benchPDOOverheadWithDBM

• 🟥 execution_time [+9.299µs; +14.535µs] or [+3.556%; +5.559%]

scenario:PHPRedisBench/benchRedisOverhead

• 🟥 execution_time [+47.170µs; +84.019µs] or [+4.491%; +8.000%]

scenario:SpanBench/benchDatadogAPI

• 🟥 execution_time [+1.588µs; +3.526µs] or [+2.530%; +5.619%]

scenario:TraceSerializationBench/benchSerializeTrace

• 🟩 execution_time [-32.696µs; -20.704µs] or [-7.387%; -4.678%]