Gracefully handle network failure during MITM + more logging

[reiniercriel]

Summary by Aikido

Security Issues: 0	Quality Issues: 0	Resolved Issues: 0

⚡ Enhancements

• Added connection timeout handling and IMDS endpoint blacklist for tunnels
• Improved error handling and logging for proxy CONNECT tunneling via proxy
• Added verbose client socket error logging during MITM tunnel setup

🔧 Refactors

• Wrapped tunnelRequest in try/catch and logged failures during execution
• Wrapped MITM request handler in try/catch and returned 502 on error

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