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/mind/mod.rs

@@ -380,7 +380,13 @@ impl Mind {
     }
 
     pub async fn unconscious_snapshots(&self) -> Vec<UnconsciousSnapshot> {
-        self.unconscious.lock().await.snapshots()
+        let unc = self.unconscious.lock().await;
+        let store = crate::store::Store::cached().await.ok();
+        let store_guard = match &store {
+            Some(s) => Some(s.lock().await),
+            None => None,
+        };
+        unc.snapshots(store_guard.as_deref())
     }
 
     pub async fn init(&self) {