fix: reset graph database in Memory.reset() (#4185)

Co-authored-by: kartik-mem0 <kartik.labhshetwar@mem0.ai>

mem0/memory/main.py

@@ -1371,6 +1371,12 @@ class Memory(MemoryBase):
             )
         capture_event("mem0.reset", self, {"sync_type": "sync"})
 
+        if self.enable_graph:
+            try:
+                self.graph.reset()
+            except Exception:
+                logger.warning("Failed to reset graph store, continuing with reset")
+
     def chat(self, query):
         raise NotImplementedError("Chat function not implemented yet.")
 
@@ -2527,5 +2533,11 @@ class AsyncMemory(MemoryBase):
         )
         capture_event("mem0.reset", self, {"sync_type": "async"})
 
+        if self.enable_graph:
+            try:
+                await asyncio.to_thread(self.graph.reset)
+            except Exception:
+                logger.warning("Failed to reset graph store, continuing with reset")
+
     async def chat(self, query):
         raise NotImplementedError("Chat function not implemented yet.")