Add SQL queries for file record analysis and S3 utility functions
- Introduced SQL queries to identify records with specific file types, including H264 variants, non-FILE audio and video files, and non-image digital files.
- Added aggregate queries to count unique base records per file type.
- Implemented S3 utility functions for file operations, including uploading, downloading, and checking file existence.
- Enhanced error handling and logging throughout the S3 file processing workflow.
- Updated requirements.txt with necessary dependencies for S3 and database interactions.
- Created utility functions for media validation, focusing on video and audio file checks.
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