Fix agent provenance and add store activity for unconscious agents

- Remove bogus "agent:" prefix from provenance - just use agent name
- Add history field to UnconsciousSnapshot
- Update snapshots() to fetch store activity via recent_by_provenance
- Fix TUI to display store activity for both agent types

Co-Authored-By: Proof of Concept <poc@bcachefs.org>

src/user/mod.rs

@@ -404,7 +404,12 @@ async fn run(
                     unc.toggle(name).await;
                 }
             }
-            app.unconscious_state = unc.snapshots();
+            let store = crate::store::Store::cached().await.ok();
+            let store_guard = match &store {
+                Some(s) => Some(s.lock().await),
+                None => None,
+            };
+            app.unconscious_state = unc.snapshots(store_guard.as_deref());
             app.graph_health = unc.graph_health.clone();
             app.mind_state = Some(mind.shared.lock().unwrap().clone());
         }