feat(telemetry): session journey view replaces raw events table

- sessions listed from client_events grouped by session id (7d window)
- timeline sheet merges page views, client events, errors, and server-fn
  activities joined by player within the session window
- vitals excluded from timelines; gap markers over 5 minutes

src/features/telemetry/index.ts

@@ -3,6 +3,7 @@ export * from "./queries";
 export * from "./range";
 export * from "./components/charts";
 export * from "./components/shared";
-export { ClientEventsTable, defaultClientEventParams } from "./components/client-events-table";
+export { SessionsList, defaultSessionParams } from "./components/sessions/sessions-list";
+export { SessionTimelineView } from "./components/sessions/session-timeline";
 export { ErrorBrowser } from "./components/error-browser";
 export { UsageScreen, USAGE_METRICS } from "./components/usage-screen";