feat: enhance memory management tools; improve lesson tracking and update descriptions for clarity

src/tool/memory/remember.rs

@@ -15,7 +15,7 @@ impl Tool for Remember {
     }
 
     fn description(&self) -> &'static str {
-        "Save a piece of information to persistent project memory. Memory entries are injected into future conversations via the system prompt, so use this to record conventions, preferences, and important context."
+        "Save a piece of information to persistent project memory. Memory entries are written to disk and can be retrieved later via the recall() tool. Use this to record conventions, preferences, and important context."
     }
 
     fn parameters(&self) -> Value {