🛡️ Sentinel: Fix sub-process OS command injection risk

[piyyy314]

🛡️ Sentinel: Mitigate OS command injection risk by disabling shell execution by default

🚨 Severity: HIGH
💡 Vulnerability: Spawning processes with { shell: true } by default inside sub-process.execute runs commands through a system shell interpreter. This exposes the application to OS command injection if unsanitized parameters, arguments, or directory paths are passed.
🎯 Impact: An attacker could potentially inject arbitrary commands if they can manipulate inputs to sub-process.execute calls.
🔧 Fix: Updated sub-process.execute to default to shell: false. Support an explicit shell option to let callers explicitly opt-in if needed.
✅ Verification: Modified test/tap/sub-process.test.js to assert that shell execution does not occur by default but executes when opted in with { shell: true }.

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PR created automatically by Jules for task 4898413375584992847 started by @piyyy314

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[piyyy314]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues

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