📈(frontend) snapshot media devices on the happy path

Also snapshot the state of media devices when the user successfully
joins a meeting, not only when something goes wrong. This gives us
the baseline needed to compute meaningful ratios — for example, the
share of users who join a meeting without granting permissions, or
without a microphone or camera available.

Without a happy-path measurement, the current error-only data has no
denominator to compare against.

src/frontend/src/features/analytics/telemetry.ts

@@ -135,7 +135,9 @@ export const captureMediaEvent = async (
     | 'media-device-topology'
     | 'media-device-success'
     | 'device-not-found'
-    | 'permissions-denied',
+    | 'permissions-denied'
+    | 'visit-room'
+    | 'connection-event',
   props: Record<string, unknown>
 ) => {
   captureEvent(event, { ...props, ...(await deviceSnapshot()) })