⚡ Bolt: Make NodeModulesScanner truly concurrent and reduce syscalls

[acebytes]

💡 What: Made findNodeModules and directorySize in NodeModulesScanner static (which makes them implicitly nonisolated) to allow TaskGroup subtasks to execute concurrently instead of being serialized on the actor's executor. Passed FileManager and skipDirs explicitly to avoid instance captures. Also replaced separate FileManager checks with a single URL.resourceValues query.

🎯 Why: Subtasks calling an isolated method on the same actor run serially, bottlenecking the recursive scan. In addition, separate fileExists and attributesOfItem calls result in unoptimized multiple syscalls.

📊 Impact: Considerably speeds up filesystem scanning by parallelizing root directory traversals across available cores, and reduces syscall overhead when examining node_modules folders.

🔬 Measurement: Run the application and observe the faster discovery of node_modules via the UI or by measuring the execution time of the NodeModulesScanner.scan method.

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PR created automatically by Jules for task 14809416139662999405 started by @acebytes

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Treat symlinked node_modules as directories

Using resourceValues(...).isDirectory == true stops detecting node_modules when that path is a symbolic link to a directory. FileManager.fileExists(atPath:isDirectory:) (the previous logic) reports such symlinks as directories, but isDirectoryKey on the symlink URL is false, so these projects are now skipped entirely and their cache size is never reported. This affects setups that symlink node_modules (common in some workspace/tooling layouts).

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