V3 graph implmentations

[shreyaspimpalgaonkar]

[!IMPORTANT] Refactor and enhance knowledge graph functionality by renaming triples to relationships, updating models, handlers, and API endpoints, and adjusting tests accordingly.

• Behavior:
  • Renamed getTriples to getRelationships in r2rV2ClientIntegrationSuperUser.test.ts and r2rV2ClientIntegrationUser.test.ts.
  • Updated KGCreationSettings in models.tsx to use kg_relationships_extraction_prompt and max_knowledge_relationships.
  • Modified get_triples to get_relationships in kg.py.
  • Changed API endpoints in kg_router.py and graph_router.py to handle relationships instead of triples.
• Models:
  • Replaced Triple with Relationship in __init__.py and other related files.
  • Updated CommunityReport to Community in abstractions/__init__.py.
• Handlers:
  • Introduced PostgresRelationshipHandler and PostgresEntityHandler in kg.py.
  • Added methods for creating, updating, and deleting entities and relationships.
• Pipes:
  • Renamed KGTriplesExtractionPipe to KGRelationshipsExtractionPipe in pipes/__init__.py.
  • Updated logic in community_summary.py and deduplication.py to handle relationships.
• Prompts:
  • Updated graphrag_relationships_extraction_few_shot.yaml to reflect relationship extraction changes.
• Tests:
  • Adjusted tests in test_kg_community_summary_pipe.py and test_kg_logic.py to align with new relationship handling.

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