- Add database index on (dataset_id, index_node_hash) for efficient deduplication queries
- Add deduplication check in SegmentService.create_segment and multi_create_segment methods
- Add deduplication check in DatasetDocumentStore.add_documents method to prevent duplicate embedding processing
- Skip creating segments with identical content hashes across the entire dataset
This prevents duplicate content from being re-processed and re-embedded when uploading documents with repeated content, improving efficiency and reducing unnecessary compute costs.