Brain-AI Memory v0.3.0

Installable provider-neutral MCP control layer with scoped memory, entity/relation bindings, exact state, deterministic action gates, lifecycle handoffs, and a one-minute tour. Adds v1/v2 Smart Connections adapter compatibility, bounded v2 snippets, and server-ranked hybrid retrieval without duplicate BM25. Includes the 20-case, 21-condition component-contract ablation (420 records). Evidence boundary: this validates public software contracts, not biological causality or end-to-end LLM QA superiority.