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fix: resolve mypy type errors across codebase
- Add type annotations for variables with inferred Any types - Add close() method to MemoryBackend protocol - Fix union type assignments in eval runners - Add explicit casts for return type mismatches - Fix None callable issues with assertions - Regenerate uv.lock to fix corrupted pillow dependency7de545c -
Add hierarchical memory system with graph + vector storage
Implement comprehensive memory system supporting: - Local backend (SQLite + FTS5 + HNSW) for zero-dependency operation - Mem0 backends (Neo4j + Qdrant) for production graph memory - DirectMem0Adapter for optimized pre-extracted data (bypasses LLM) - Memory extraction with facts, entities, and relationships - Proxy integration with --memory flag for automatic memory injection Key components: - headroom/memory/backends/: LocalBackend, Mem0Backend, DirectMem0Adapter - headroom/memory/system.py: MemorySystem with tool-based interface - headroom/memory/extraction.py: Entity and relationship extraction - headroom/proxy/memory_handler.py: Proxy integration layer - headroom/prediction/feature_extractor.py: Content analysis features Testing: - 217 new memory system tests covering all backends - LoCoMo evaluation framework for memory quality assessment - Integration tests for proxy memory functionality Also removes deprecated example files in favor of focused test coverage.eb1c19a
