* 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.
* 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)
