feat(TRUEREF-0023): add sqlite-vec search pipeline

src/lib/server/pipeline/embed-worker-entry.ts

@@ -21,6 +21,11 @@ const db = new Database(dbPath);
 db.pragma('journal_mode = WAL');
 db.pragma('foreign_keys = ON');
 db.pragma('busy_timeout = 5000');
+db.pragma('synchronous = NORMAL');
+db.pragma('cache_size = -65536');
+db.pragma('temp_store = MEMORY');
+db.pragma('mmap_size = 268435456');
+db.pragma('wal_autocheckpoint = 1000');
 
 // Load the embedding profile from DB
 const rawProfile = db.prepare('SELECT * FROM embedding_profiles WHERE id = ?').get(embeddingProfileId);