fix(mem0-ts): wait for memory set to settle before returning from waitForMemories

The live-API integration suites failed intermittently on a different
test each run: CRUD delete 404ing on a known ID, batch update/delete
failing, search returning nothing.

All three share one cause. waitForMemories returned as soon as one
memory existed, but the v3 pipeline was still consolidating, and
consolidation replaces a memory (delete + add) rather than editing it
in place. Tests captured memoryIds at that moment and later acted on
IDs the platform had already invalidated.

Wait for quiescence instead: two consecutive polls returning the same
sorted ID set. Compare IDs rather than length, since a replacement
leaves the count unchanged. Fixed in the one shared helper every
integration suite seeds through.

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

@@ -52,13 +52,17 @@ export async function withRetry<T>(
 }
 
 /**
- * Poll getAll until memories appear for a user.
- * The Mem0 API processes memories asynchronously — after add()
- * we need to wait for them to be available.
+ * Poll getAll until a user's memories reach minCount and the ID set
+ * stops changing between polls.
+ *
+ * The Mem0 API processes memories asynchronously, and consolidating a
+ * new fact replaces a memory (delete + add) instead of editing it in
+ * place. Returning on the first non-empty read hands callers IDs the
+ * pipeline then invalidates, so compare IDs rather than length: a
+ * replacement leaves the count unchanged.
  *
  * Polls every 15 seconds with a maximum of 4 retries to avoid
- * hitting rate limits. Throws if results aren't available after
- * all retries.
+ * hitting rate limits. Throws if minCount is never reached.
  */
 export async function waitForMemories(
   client: MemoryClient,
@@ -66,18 +70,32 @@ export async function waitForMemories(
   minCount: number,
   maxRetries = 4,
 ): Promise<Memory[]> {
+  let memories: Memory[] = [];
+  let previousIds = "";
+
   for (let attempt = 1; attempt <= maxRetries; attempt++) {
     const response = await withRetry(() =>
       client.getAll({ filters: { user_id: userId } }),
     );
-    const memories = response.results ?? [];
-    if (memories.length >= minCount) {
+    memories = response.results ?? [];
+
+    const ids = memories
+      .map((m) => m.id)
+      .sort()
+      .join(",");
+    if (memories.length >= minCount && ids === previousIds) {
       return memories;
     }
+    previousIds = ids;
+
     if (attempt < maxRetries) {
       await new Promise((r) => setTimeout(r, 15_000));
     }
   }
+
+  if (memories.length >= minCount) {
+    return memories;
+  }
   throw new Error(
     `waitForMemories: expected at least ${minCount} memories for user "${userId}" but did not get them after ${maxRetries} attempts`,
   );