This PR resolves the merge conflicts from #76 (Extraction improvements) and prepares it for review.

What's included

All changes from PR #76 (extraction-improvements) merged cleanly with the latest main:

Extraction improvements (from #76)

• Extraction-to-Storage Bridge: ShortTermMemory now wires to LongTermMemory.ingest_extracted_entities_batch() so extracted entities get embeddings, deduplication, and entity resolution
• Extraction Result Deduplication: ExtractionResult.deduplicate_entities() deduplicates by normalized_name::type and filters orphaned relations
• Source-Weighted Confidence Merge: Pipeline applies source weights (LLM=1.0, GLiNER=0.9, spaCy=0.7) with cross-extractor consensus boost
• Subtype-Aware Entity Key: _entity_key() includes subtype to prevent incorrect merging of same-name entities with different subtypes
• Type-Aware Resolution Wiring: Resolvers now accept existing_entity_types for type-constrained resolution

Conflict resolution

• CLAUDE.md: Merged both sets of implementation notes (extraction notes 28-32 + MCP notes 33-38)
• README.md: Kept main's restructured README layout while discarding HEAD's superseded documentation sections

Changed files (from #76)

• src/neo4j_agent_memory/extraction/base.py – entity deduplication
• src/neo4j_agent_memory/extraction/pipeline.py – source weights, subtype key
• src/neo4j_agent_memory/memory/long_term.py – ingest batch, type-aware resolution
• src/neo4j_agent_memory/memory/short_term.py – long_term wiring
• src/neo4j_agent_memory/resolution/*.py – existing_entity_types parameter
• tests/unit/test_entity_ingest_pipeline.py – new tests
• tests/unit/test_entity_deduplication.py – updated tests
• docs updates

Closes #76