Fix client test mock for synchronous json() method

Replace AsyncMock with Mock for response object since httpx response.json() is synchronous, not async. This fixes the TypeError in the client tests.

Author: abrookins

agent-memory-client/tests/test_client.py

@@ -7,7 +7,7 @@
 
 import asyncio
 from collections.abc import AsyncGenerator
-from unittest.mock import AsyncMock, patch
+from unittest.mock import AsyncMock, Mock, patch
 
 import httpx
 import pytest
@@ -310,7 +310,7 @@ class TestRecencyConfig:
     async def test_recency_config_descriptive_parameters(self, enhanced_test_client):
         """Test that RecencyConfig descriptive parameters are properly sent to API."""
         with patch.object(enhanced_test_client._client, "post") as mock_post:
-            mock_response = AsyncMock()
+            mock_response = Mock()
             mock_response.raise_for_status.return_value = None
             mock_response.json.return_value = MemoryRecordResults(
                 total=0, memories=[], next_offset=None