- Refactor FileChunk class to use Pydantic field and model validators
- Add proper validation for total_length with size constraints
- Implement __iadd__ operator for cleaner chunk appending
- Extract blob chunk processing logic into a dedicated _process_blob_chunks method
- Add comprehensive docstrings for better code documentation
- Add unit tests for FileChunk class
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Co-Authored-By: Claude <noreply@anthropic.com>