fix(retrieval): ensure store initialization before hybrid routing

Author: Robinzhh

src/retriever.ts

@@ -561,6 +561,9 @@ export class MemoryRetriever {
   async retrieve(context: RetrievalContext): Promise<RetrievalResult[]> {
     const { query, limit, scopeFilter, category, source } = context;
     const safeLimit = clampInt(limit, 1, 20);
+    // Ensure store is fully initialized before routing decision (hybrid vs vector-only).
+    // Without this, hasFtsSupport may be false on first call if FTS index creation is still in flight.
+    await this.store.ensureInitialized();
     this.lastDiagnostics = null;
     const diagnostics: RetrievalDiagnostics = {
       source,

src/store.ts

@@ -220,7 +220,8 @@ export class MemoryStore {
     return this.config.dbPath;
   }
 
-  private async ensureInitialized(): Promise<void> {
+  /** Ensure the store is fully initialized (FTS index created, table opened, etc.). Safe to call multiple times. */
+  public async ensureInitialized(): Promise<void> {
     if (this.table) {
       return;
     }