🧹 Fix swallowed exceptions in BetterAuthService

[mleem97]

🎯 What: Modified BetterAuthService.cs to explicitly log exceptions using AppFileLog.Error instead of swallowing them with empty or comment-only catch blocks.
💡 Why: Silently caught exceptions hide failures, making debugging and troubleshooting authentication issues extremely difficult. Logging them ensures any failures during login or session verification are captured.
✅ Verification: Re-compiled the project and ran the GregModmanager.Tests suite to ensure no tests or core behavior was broken.
✨ Result: Improved maintainability and traceability of the BetterAuthService without affecting its external behavior.

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PR created automatically by Jules for task 12354467878709416632 started by @mleem97

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