chore: fix formatting and clippy lints

stub/src/main.rs

@@ -170,11 +170,11 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                 }
             }
         }
-        
+
         if retry_count >= 20 {
             return Err("Failed to connect to the MCP memory server after multiple attempts. Is it running?".into());
         }
-        
+
         Ok(())
     })
 }