🛡️ Sentinel: [security improvement] Add Command Injection and Hardcoded Password rules

[seonghobae]

🚨 Severity: HIGH
💡 Vulnerability: Missing detection rules for Command Injection (OWASP A03) and hardcoded passwords (OWASP A07).
🎯 Impact: AI-generated code could introduce command injection vulnerabilities or hardcode passwords without the vibesec scanner flagging them, putting projects at risk.
🔧 Fix: Added node-command-injection, python-command-injection, and hardcoded-password rules to SCAN_RULES in scanner/cli/vibesec.py. Updated .jules/sentinel.md journal.
✅ Verification: Ran vibesec scan . locally and verified the new patterns are matched and appropriately flagged. Ran PYTHONPATH=. pytest tests/ with zero regressions.

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PR created automatically by Jules for task 13359863990700178971 started by @seonghobae

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[github-actions]

OpenCode Review Overview

• Head SHA: 1faf3a2ec9b5c19fe8a74f8f16f90ee73675ddf2
• Workflow run: 27861368599
• Workflow attempt: 1
• Gate result: APPROVE (exit 0)

[opencode-agent]

OpenCode Agent approved this PR.

The PR adds new security scanner rules for command injection and hardcoded passwords, addressing critical OWASP vulnerabilities. The changes are well-documented and align with the project's security goals.

• Result: APPROVE
• Reason: No blockers found in the changes.
• Head SHA: 1faf3a2ec9b5c19fe8a74f8f16f90ee73675ddf2
• Workflow run: 27861368599
• Workflow attempt: 1