🛡️ Sentinel: [CRITICAL] Fix bare except blocks

[NoWon1]

🚨 Severity: CRITICAL
💡 Vulnerability: Bare except: blocks swallowing system signals like KeyboardInterrupt and SystemExit.
🎯 Impact: Localized Denial of Service (DoS) and severe reliability risks as the simulation cannot be properly interrupted or terminated.
🔧 Fix: Replaced all bare except: blocks with except Exception: to correctly handle application errors while allowing system signals to propagate.
✅ Verification: Ran bandit -r . and confirmed B112 warnings are mitigated properly. Code reviewed and no regressions detected.

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PR created automatically by Jules for task 9271631653105962422 started by @NoWon1

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