🛡️ Sentinel: [MEDIUM] Fix bare except vulnerability

[NoWon1]

🚨 Severity: MEDIUM
💡 Vulnerability: Bare except: blocks within nested loops swallow all system-level exceptions, including KeyboardInterrupt and SystemExit.
🎯 Impact: In long-running simulation loops, swallowing KeyboardInterrupt prevents graceful termination, leading to a localized Denial of Service and making debugging nearly impossible when errors occur deep within spatial lookups.
🔧 Fix: Replaced bare except: blocks with except Exception: to only catch standard program errors while allowing critical system signals to propagate to the Python runtime. Also added a static analysis script (test_security.py) leveraging the ast module to prevent bare excepts moving forward.
✅ Verification: Ensure the automated test_security.py script passes (run via python -m pytest test_security.py).

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PR created automatically by Jules for task 4614801728459202482 started by @NoWon1

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