Fix dependency and tests and updated docstring (#3337)

server/main.py

@@ -151,7 +151,15 @@ def search_memories(search_req: SearchRequest):
 
 @app.put("/memories/{memory_id}", summary="Update a memory")
 def update_memory(memory_id: str, updated_memory: Dict[str, Any]):
-    """Update an existing memory."""
+    """Update an existing memory with new content.
+    
+    Args:
+        memory_id (str): ID of the memory to update
+        updated_memory (str): New content to update the memory with
+        
+    Returns:
+        dict: Success message indicating the memory was updated
+    """
     try:
         return MEMORY_INSTANCE.update(memory_id=memory_id, data=updated_memory)
     except Exception as e: