fix: rename R2 object key prefix from live/ to hls/ for consistency

backend/playout/src/playlist.go

@@ -124,7 +124,7 @@ func watchAndPublishSegments(ctx context.Context, hlsOutputDir string) {
 				time.Sleep(500 * time.Millisecond)
 				segSequence++
 				lastSegmentSeq = segSequence
-				key := "live/" + runID + "/" + filepath.Base(event.Name)
+				key := "hls/" + runID + "/" + filepath.Base(event.Name)
 				if err := SyncToR2(event.Name, key); err != nil {
 					consecutiveFails++
 					fmt.Printf("Failed to sync segment %s: %v\n", event.Name, err)
@@ -153,15 +153,15 @@ func publishManifest(localManifestPath string) error {
 	}
 
 	// 1. Upload to temp key
-	if err := SyncToR2(localManifestPath, "live/playlist.m3u8.tmp"); err != nil {
+	if err := SyncToR2(localManifestPath, "hls/playlist.m3u8.tmp"); err != nil {
 		return fmt.Errorf("temp manifest upload failed: %w", err)
 	}
 
 	// 2. Atomic copy to final key
 	_, err := r2Client.CopyObject(context.TODO(), &s3.CopyObjectInput{
 		Bucket:     aws.String(bucket),
-		CopySource: aws.String(bucket + "/live/playlist.m3u8.tmp"),
-		Key:        aws.String("live/playlist.m3u8"),
+		CopySource: aws.String(bucket + "/hls/playlist.m3u8.tmp"),
+		Key:        aws.String("hls/playlist.m3u8"),
 	})
 	if err != nil {
 		return fmt.Errorf("manifest atomic swap failed: %w", err)
@@ -704,7 +704,7 @@ func syncLatestToR2(hlsDir string) error {
 	}
 
 	for _, f := range files {
-		key := "live/" + runID + "/" + filepath.Base(f)
+		key := "hls/" + runID + "/" + filepath.Base(f)
 		if err := SyncToR2(f, key); err != nil {
 			fmt.Printf("Failed to sync %s: %v\n", f, err)
 		} else {
@@ -714,7 +714,7 @@ func syncLatestToR2(hlsDir string) error {
 
 	// Sync init segment to run-specific R2 key
 	initPath := filepath.Join(hlsDir, "init.mp4")
-	if err := SyncToR2(initPath, "live/"+runID+"/init.mp4"); err != nil {
+	if err := SyncToR2(initPath, "hls/"+runID+"/init.mp4"); err != nil {
 		return err
 	}
 	fmt.Println("Synced init.mp4 to R2")