perf(app): reduce startup websocket work

Make provider catalogs compact and content-addressed so repeat launches can reuse the persisted snapshot instead of transferring it again. Remove eager global catalog loading and the stopped-agent defensive tail fetch, while keeping sequence-gap and reconnect recovery as the correctness paths. Add an opt-in production-ID Android profiling build for local startup traces.

packages/app/src/screens/workspace/workspace-screen.tsx

@@ -74,6 +74,7 @@ import { ImportSessionSheet } from "@/components/import-session-sheet";
 import { useToast } from "@/contexts/toast-context";
 import { selectIsFileExplorerOpen, usePanelStore } from "@/stores/panel-store";
 import { type ExplorerCheckoutContext } from "@/stores/explorer-checkout-context";
+import { traceInstant } from "@/performance/native-trace";
 import { useSessionStore, type WorkspaceDescriptor } from "@/stores/session-store";
 import {
   collectAllTabs,
@@ -938,6 +939,12 @@ export const WorkspaceScreen = memo(function WorkspaceScreen({
   recoveryAgentId,
 }: WorkspaceScreenProps) {
   const navigationFocused = useIsFocused();
+  useEffect(() => {
+    traceInstant("paseo.workspace.mount", { serverId, workspaceId });
+    return () => {
+      traceInstant("paseo.workspace.unmount", { serverId, workspaceId });
+    };
+  }, [serverId, workspaceId]);
   return (
     <WorkspaceScreenContent
       serverId={serverId}