🛡️ Sentinel: [MEDIUM] Fix bare except blocks swallowing system signals

[NoWon1]

🚨 Severity: MEDIUM
💡 Vulnerability: Bare except: blocks inside tightly nested spatial loops.
🎯 Impact: These blocks catch all exceptions, including KeyboardInterrupt or SystemExit from BaseException. This can make the process unkillable and cause a localized Denial of Service (DoS).
🔧 Fix: Replaced all bare except: statements with except Exception: to ensure that system-level exceptions can propagate correctly while continuing to catch standard application errors within the loops.
✅ Verification: Ran bandit security linter and pytest. Also compiled with python -m py_compile to ensure valid syntax. Checked with grep that no bare except: blocks remain.

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PR created automatically by Jules for task 13625477491284353165 started by @NoWon1

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