perf(test): speed up line, models list, and memory batch

src/memory/index.test.ts

@@ -6,6 +6,10 @@ import { getMemorySearchManager, type MemoryIndexManager } from "./index.js";
 
 let embedBatchCalls = 0;
 
+vi.mock("./sqlite-vec.js", () => ({
+  loadSqliteVecExtension: async () => ({ ok: false, error: "sqlite-vec disabled in tests" }),
+}));
+
 vi.mock("./embeddings.js", () => {
   const embedText = (text: string) => {
     const lower = text.toLowerCase();