🔧 Code Quality: Improve error handling and add proper exception management

[ManvithGopu13]

Error Handling Issues

Current Problems:

1. Generic Exception Handling

   • All routes catch generic Exception without specific handling
   • No distinction between different error types
   • Same error response for all failures

2. Missing Error Handling

   • functions/video/video_kaggle.py: No error handling for file operations
   • No validation that video_path exists before opening
   • No handling for Kaggle API failures beyond basic checks

3. Silent Failures

   • functions/video/video_kaggle.py:14,19,34: Functions return None on error instead of raising exceptions
   • Callers don't know if operation failed
   • Could cause NoneType errors downstream

4. No Error Context

   • Error messages don't include request context
   • Difficult to debug production issues
   • No error tracking/monitoring integration

5. File Operation Errors

   • No handling for permission errors
   • No handling for disk space issues
   • No validation of file paths

Recommended Fixes:

• Create custom exception classes for different error types
• Add specific exception handling for common failures
• Ensure functions raise exceptions instead of returning None
• Add request context to error logs
• Implement proper error responses with appropriate HTTP status codes
• Add error monitoring (e.g., Sentry integration)

Priority: Medium
Type: Code Quality