🛡️ Sentinel: [MEDIUM] Fix process execution deadlock vulnerability

[acebytes]

🚨 Severity: MEDIUM
💡 Vulnerability: docker system prune could cause a process deadlock if its output exceeded the ~64KB macOS pipe buffer, because waitUntilExit() was called before reading the pipe. The child blocks on write() while the parent blocks on waitUntilExit().
🎯 Impact: The app's CacheoutViewModel would freeze indefinitely waiting for a blocked docker process to exit.
🔧 Fix: Read the pipe's output data fully before waitUntilExit().
✅ Verification: Checked CacheoutViewModel.swift to ensure pipe reading correctly precedes waitUntilExit(). Ran code review and formatting checks.

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PR created automatically by Jules for task 1658399777607059646 started by @acebytes

[google-labs-jules]

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[acebytes]

Duplicate of #236 (same one-line read-before-wait fix in CacheoutViewModel.runCleanCommand). Keeping #236 as canonical.

[google-labs-jules]

Duplicate of #236 (same one-line read-before-wait fix in CacheoutViewModel.runCleanCommand). Keeping #236 as canonical.

Understood. Acknowledging that this work is a duplicate and is now obsolete, and stopping work on this task.