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/components/rerankers/models/cohere.mdx

@@ -35,7 +35,7 @@ config = {
     "llm": {
         "provider": "openai",
         "config": {
-            "model": "gpt-4.1-nano-2025-04-14"
+            "model": "gpt-5-mini"
         }
     },
     "reranker": {
@@ -95,7 +95,7 @@ messages = [
 memory.add(messages, user_id="bob")
 
 # Search with reranking
-results = memory.search("What is the user's profession?", user_id="bob")
+results = memory.search("What is the user's profession?", filters={"user_id": "bob"})
 
 for result in results['results']:
     print(f"Memory: {result['memory']}")