Replace better-sqlite3 with built-in SQLite drivers

package.json

@@ -1,6 +1,6 @@
 {
   "name": "identitydb",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "TypeScript memory graph database wrapper for topics, facts, and AI-assisted ingestion.",
   "license": "MIT",
   "type": "module",
@@ -36,13 +36,11 @@
     "ai"
   ],
   "dependencies": {
-    "better-sqlite3": "^12.1.1",
     "kysely": "^0.28.8",
     "mysql2": "^3.15.3",
     "pg": "^8.16.0"
   },
   "devDependencies": {
-    "@types/better-sqlite3": "^7.6.13",
     "@types/node": "^24.0.0",
     "@types/pg": "^8.20.0",
     "tsup": "^8.5.0",