unify folder naming with resolved audio profiles across providers

internal/provider/tidal/client_test.go

@@ -315,4 +315,7 @@ func TestGetDownloadableLosslessUsesTrackManifestWhenPlaybackIsAAC(t *testing.T)
 	if d.Extension != "flac" {
 		t.Fatalf("extension = %q, want flac", d.Extension)
 	}
+	if d.Audio.Container != "FLAC" || d.Audio.Quality != "LOSSLESS" {
+		t.Fatalf("unexpected audio profile: %+v", d.Audio)
+	}
 }