refactor(core): dedupe shared config and runtime helpers

src/memory/test-runtime-mocks.ts

@@ -0,0 +1,13 @@
+import { vi } from "vitest";
+
+// Unit tests: avoid importing the real chokidar implementation (native fsevents, etc.).
+vi.mock("chokidar", () => ({
+  default: {
+    watch: () => ({ on: () => {}, close: async () => {} }),
+  },
+  watch: () => ({ on: () => {}, close: async () => {} }),
+}));
+
+vi.mock("./sqlite-vec.js", () => ({
+  loadSqliteVecExtension: async () => ({ ok: false, error: "sqlite-vec disabled in tests" }),
+}));