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⚡ Bolt: Change scanner and cleaner actors to structs to fix parallel I/O bottleneck#36

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bolt/parallel-io-struct-refactor-9604150772285638711
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⚡ Bolt: Change scanner and cleaner actors to structs to fix parallel I/O bottleneck#36
acebytes wants to merge 1 commit intomainfrom
bolt/parallel-io-struct-refactor-9604150772285638711

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@acebytes
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💡 What: Changed CacheScanner, NodeModulesScanner, and CacheCleaner from actor to struct.
🎯 Why: Using an actor inadvertently serializes execution of tasks in withTaskGroup when tasks perform synchronous FileManager operations. Using struct enables true parallelism by allowing these operations to run concurrently across threads.
📊 Impact: Considerably faster scanning and cleaning execution times by leveraging actual parallel processing instead of serialized tasks.
🔬 Measurement: Run a clean and check time elapsed vs before. Codebase-specific learnings about avoiding this anti-pattern were recorded in .jules/bolt.md.


PR created automatically by Jules for task 9604150772285638711 started by @acebytes

…leneck

By using an `actor` to manage a `withTaskGroup` where tasks invoke synchronous, blocking I/O (like `FileManager` operations) directly on the actor inadvertently serializes the tasks, preventing parallelism.
Changing `CacheScanner`, `NodeModulesScanner`, and `CacheCleaner` to `struct` allows these I/O operations to run concurrently across threads.

Co-authored-by: acebytes <2820910+acebytes@users.noreply.github.com>
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