🛡️ Sentinel: [CRITICAL] Fix Argument Injection in Grep Search

[Dan-StrategicAutomation]

🚨 Severity: CRITICAL
💡 Vulnerability: Command argument injection in utils/io/files.py search functionality, where untrusted queries could be interpreted as grep options (e.g. --version).
🎯 Impact: Attackers could inject arbitrary command options into grep or git grep processes if they can control the search query input.
🔧 Fix: Added -e to explicitly denote the query as a pattern, and the -- separator to signify the end of command-line options before passing untrusted positional arguments.
✅ Verification: Ran pytest suite ensuring all tests pass with the modified logic.

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PR created automatically by Jules for task 12374325770268333175 started by @Dan-StrategicAutomation

[google-labs-jules]

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