docs: new algorithm migration guides + memory evaluation (#4811)

Co-authored-by: kartik-mem0 <kartik.labhshetwar@mem0.ai>
Co-authored-by: Saket Aryan <saketaryan2002@gmail.com>

docs/integrations/agno.mdx

@@ -37,7 +37,7 @@ from agno.tools.mem0 import Mem0Tools
 
 agent = Agent(
     name="Memory Agent",
-    model=OpenAIChat(id="gpt-4.1-nano-2025-04-14"),
+    model=OpenAIChat(id="gpt-5-mini"),
     tools=[Mem0Tools()],
     description="An assistant that remembers and personalizes using Mem0 memory."
 )
@@ -126,7 +126,7 @@ def chat_user(
 
     if user_input:
         # Search for relevant memories
-        memories = client.search(user_input, user_id=user_id)
+        memories = client.search(user_input, filters={"user_id": user_id})
         memory_context = "\n".join(f"- {m['memory']}" for m in memories['results'])
 
         # Construct the prompt