🛡️ Sentinel: [MEDIUM] Fix Log Injection (CRLF) in main block

[ManupaKDU]

🚨 Severity: MEDIUM
💡 Vulnerability: Log Injection (CRLF) in the exception handler of the __main__ block. The exception message from ipaddress.ip_address contains the original untrusted input. If an attacker passes a string with newline characters (\n), they can inject arbitrary logs or forge log entries.
🎯 Impact: An attacker could forge log entries to hide malicious activity or trick log parsing systems.
🔧 Fix: Wrapped str(e) in repr() inside the logging.error call to safely escape newline characters and securely log the error without evaluating control characters.
✅ Verification: Verified by throwing a mocked ValueError containing a payload like "127.0.0.1\nERROR:System Compromised". Using repr(str(e)) safely outputs the newline as \n instead of creating a new log line. Verified tests continue to pass.

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PR created automatically by Jules for task 8841046149287603773 started by @ManupaKDU

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