csm-memory 0.3.8

Concept store and singularity engine for chaotic_semantic_memory.

This crate provides the core memory engine with:

• Singularity: Core concept store with similarity search
• Concept: Core data type with versioning support
• MetadataFilter: Predicate-based filtering for similarity search
• AnnIndex: Approximate nearest neighbor index abstraction
• graph_traversal: BFS, Dijkstra on the concept graph