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⚡ Bolt: [performance improvement] Batch ArtifactStore GC operations#265

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⚡ Bolt: [performance improvement] Batch ArtifactStore GC operations#265
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⚡ Bolt: [performance improvement] Batch ArtifactStore GC operations

💡 What: Refactored ArtifactStore.gc to use batched concurrent I/O (Promise.all with chunk size 10) for fs.stat and fs.rm operations.
🎯 Why: Iterating over large numbers of files sequentially creates severe performance bottlenecks and increases execution time linearly. This optimization significantly speeds up file metadata resolution and deletion while preventing EMFILE (too many open files) limits.
📊 Impact: Considerably faster garbage collection for directories with many files.
🔬 Measurement: Verified with unit tests that garbage collection behavior and counts remain exact.


PR created automatically by Jules for task 4279959295618333182 started by @YoungSx

💡 What: Refactored `ArtifactStore.gc` to use batched concurrent I/O (`Promise.all` with chunk size 10) for `fs.stat` and `fs.rm` operations.
🎯 Why: Iterating over large numbers of files sequentially creates severe performance bottlenecks and increases execution time linearly. This optimization significantly speeds up file metadata resolution and deletion while preventing EMFILE (too many open files) limits.
📊 Impact: Considerably faster garbage collection for directories with many files.
🔬 Measurement: Verified with unit tests that garbage collection behavior and counts remain exact.
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