feat: enhance lesson management and review system

- Added LessonAccept and LessonReject actions to manage lesson outcomes.
- Implemented probe for build/test verification before triggering reviews.
- Introduced a mechanism for recording shadow hits and evaluating trials in the ReviewSystem.
- Enhanced lesson structure with additional fields for scope, snippets, and provenances.
- Updated command parsing to include lesson acceptance and rejection commands.
- Improved session state management with staleness sweeps and retrospective creation.
- Enhanced UI to display detailed usage statistics and quality trends.

src/tool/memory/remember.rs

@@ -69,6 +69,10 @@ impl Tool for Remember {
             updated_at: now,
             outcome: None,
             lifecycle: "new".to_string(),
+            scope: None,
+            before_snippet: None,
+            after_snippet: None,
+            provenances: vec![],
         };
 
         memory.write(&ctx.memory_dir)