## CHANGES
- Move timestamp regex initialization to init function
- Add parseSeconds helper function for fractional seconds
- Replace direct strconv.Atoi calls with parseSeconds function
- Support decimal seconds in timestamp format parsing
- Extract seconds parsing logic into reusable function
### CHANGES
- Update `timestampRegex` to support optional seconds/milliseconds
- Change `seenSegments` to use `struct{}` for memory efficiency
- Refactor duplicate check using `struct{}` pattern
- Improve readability by restructuring timestamp logic
- Add deduplication map to track seen segments
- Skip duplicate text segments in plain VTT processing
- Skip duplicate segments in timestamped VTT processing
- Improve timestamp regex to handle more formats
- Use clean text as deduplication key consistently
### CHANGES
- Introduce `cmd` directory for all main application binaries.
- Move all Go packages into the `internal` directory.
- Rename the `restapi` package to `server` for clarity.
- Consolidate patterns and strategies into a new `data` directory.
- Group all auxiliary scripts into a new `scripts` directory.
- Move all documentation and images into a `docs` directory.
- Update all Go import paths to reflect the new structure.
- Adjust CI/CD workflows and build commands for new layout.
