feat(mcp): v1.4.0 — FTS5 search, chunk truncation, FTS rebuild on startup

- Switch rah_search_nodes and rah_search_content from LIKE to FTS5 with word-split LIKE fallback
- Rebuild nodes_fts and chunks_fts indexes on server startup
- Cap chunk field at 10K chars in rah_get_nodes (adds chunk_truncated, chunk_length)
- Multi-word queries now work ("Tesla manufacturing" finds both words anywhere)
- Relevance-ranked results when FTS available

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/mcp-server-standalone/package.json

@@ -1,6 +1,6 @@
 {
   "name": "ra-h-mcp-server",
-  "version": "1.2.0",
+  "version": "1.4.0",
   "description": "Connect Claude Code/Desktop to your RA-H knowledge base. Direct SQLite access - no web app required.",
   "main": "index.js",
   "bin": {