fix: restore v3 search response format — return {results: [...]} not bare array

The v3 API returns {results: [...]} and the client should pass that
through without unwrapping. Updated return type to Promise<{results: Array<Memory>}>,
removed the unwrap logic, and fixed integration tests to access .results.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mem0-ts/src/client/mem0.ts

@@ -280,7 +280,7 @@ export default class MemoryClient {
   async search(
     query: string,
     options?: SearchMemoryOptions,
-  ): Promise<Array<Memory>> {
+  ): Promise<{ results: Array<Memory> }> {
     if (this.telemetryId === "") await this.ping();
     const payloadKeys = Object.keys(options || {});
     this._captureEvent("search", [payloadKeys]);
@@ -298,8 +298,7 @@ export default class MemoryClient {
         body: JSON.stringify(payload),
       },
     );
-    // Unwrap v1.1 format: { results: [...] } → [...]
-    return Array.isArray(response) ? response : (response?.results ?? response);
+    return response;
   }
 
   async delete(memoryId: string): Promise<{ message: string }> {

mem0-ts/src/client/tests/integration/helpers.ts

@@ -92,7 +92,8 @@ export async function waitForSearchResults(
   maxRetries = 4,
 ): Promise<Memory[]> {
   for (let attempt = 1; attempt <= maxRetries; attempt++) {
-    const results = await withRetry(() => client.search(query, options));
+    const response = await withRetry(() => client.search(query, options));
+    const results = response?.results ?? [];
     if (results.length > 0) {
       return results;
     }

mem0-ts/src/client/tests/integration/search.test.ts

@@ -108,16 +108,16 @@ describeIntegration("MemoryClient Integration — Search & History", () => {
   // ─── Edge cases ─────────────────────────────────────────
   describe("edge cases", () => {
     test("search for non-existent user returns empty results", async () => {
-      const results = await client.search("anything", {
+      const response = await client.search("anything", {
         filters: { userId: `nonexistent-user-${randomUUID()}` },
       });
 
-      expect(Array.isArray(results)).toBe(true);
-      expect(results.length).toBe(0);
+      expect(response).toHaveProperty("results");
+      expect(response.results).toHaveLength(0);
     });
 
     test("search with top_k param does not throw", async () => {
-      const results = await client.search(
+      const response = await client.search(
         "Tell me about integration test user",
         {
           filters: { userId: TEST_USER_ID },
@@ -125,7 +125,7 @@ describeIntegration("MemoryClient Integration — Search & History", () => {
         },
       );
 
-      expect(Array.isArray(results)).toBe(true);
+      expect(response).toHaveProperty("results");
     });
   });
 });