Knowledge Analytics 1.0.0

Initial Knowledge Analytics release for Obsidian.\n\nIncludes:\n- Omnisearch-first vault search with graph reranking and zero-hit broad-query rescue.\n- Local-only Knowledge Analytics HTTP API for obsidian-knowledge-mcp.\n- Health, diagnostics, route tracing, concept clustering, benchmark, and write-safety tooling.\n- README dependency notes for Omnisearch and Obsidian Local REST API workflows.