Improved code formatting, line breaks, and indentation across chunking logic and multiple test modules to enhance code clarity and maintain consistent style. No functional changes made.
- Wrap store_embeddings_batch in transaction for all-or-nothing semantics
- Add replace_source_embeddings method for atomic document updates
- Update collection_manager to use transactional replace
- Prevents race conditions and data inconsistency (closes#77)
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>