Add playback metric endpoint sent to OTEL

shared/models/metrics/playback-metric-create.model.ts

@@ -0,0 +1,19 @@
+import { VideoResolution } from '../videos'
+
+export interface PlaybackMetricCreate {
+  playerMode: 'p2p-media-loader' | 'webtorrent'
+
+  resolution?: VideoResolution
+  fps?: number
+
+  resolutionChanges: number
+
+  errors: number
+
+  downloadedBytesP2P: number
+  downloadedBytesHTTP: number
+
+  uploadedBytesP2P: number
+
+  videoId: number | string
+}