perf(fleet): cache grouped views with revision-based invalidation

wakey-control-plane/src/api/mod.rs

@@ -6,6 +6,7 @@ mod audit;
 mod commands;
 mod control;
 mod terminals;
+pub(crate) use control::FleetCache;
 
 pub use alerts::{AlertsHub, active_alerts, alert_history, alerts_stream, run_alert_evaluator};
 pub use audit::list_audit_events;