* Refactor deduplication logic to enhance node resolution and track duplicate pairs (#929)
* Simplify deduplication process in bulk_utils by reusing canonical nodes.
* Update dedup_helpers to store duplicate pairs during resolution.
* Modify node_operations to append duplicate pairs when resolving nodes.
* Add tests to verify deduplication behavior and ensure correct state updates.
* reveret to concurrent dedup with fanout and then reconcilation
* add performance note for deduplication loop in bulk_utils
* enhance deduplication logic in bulk_utils to handle missing canonical nodes gracefully
* Update graphiti_core/utils/bulk_utils.py
Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>
* refactor deduplication logic in bulk_utils to use directed union-find for canonical UUID resolution
* implement _build_directed_uuid_map for efficient UUID resolution in bulk_utils
* document directed union-find lookup in bulk_utils for clarity
---------
Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>
* add repository guidelines and project structure documentation
* update neo4j image version and modify test command to disable specific databases
* implement deduplication helpers and integrate with node operations
* refactor string formatting to use single quotes in node operations
* enhance deduplication helpers with UUID indexing and update resolution logic
* implement exact fact matching (#931)
