📈(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/rooms/components/Conference.tsx

@@ -26,11 +26,7 @@ import { css } from '@/styled-system/css'
 import { BackgroundProcessorFactory } from '../livekit/components/blur'
 import { LocalUserChoices } from '@/stores/userChoices'
 import { MediaDeviceErrorAlert } from './MediaDeviceErrorAlert'
-import {
-  captureEvent,
-  reportError,
-  captureMediaEvent,
-} from '@/features/analytics/telemetry'
+import { captureMediaEvent, reportError } from '@/features/analytics/telemetry'
 import { useConfig } from '@/api/useConfig'
 import { isFireFox } from '@/utils/livekit'
 import { useIsMobile } from '@/utils/useIsMobile'
@@ -65,7 +61,7 @@ export const Conference = ({
   const { username } = useSnapshot(userStore)
 
   useEffect(() => {
-    captureEvent('visit-room', { slug: roomId })
+    void captureMediaEvent('visit-room', { slug: roomId })
   }, [roomId])
   const fetchKey = [keys.room, roomId]