feat: add beatport provider

internal/audio/tag/tagger.go

@@ -21,6 +21,7 @@ type Metadata struct {
 	DiscTotal           int
 	Date                string
 	Genre               string
+	InitialKey          string
 	Comment             string
 	Description         string
 	Lyrics              string
@@ -160,6 +161,7 @@ func toTags(meta Metadata) map[string]string {
 		"album_artist":          meta.AlbumArtist,
 		"date":                  meta.Date,
 		"genre":                 meta.Genre,
+		"INITIALKEY":            meta.InitialKey,
 		"comment":               meta.Comment,
 		"description":           meta.Description,
 		"lyrics":                meta.Lyrics,

internal/audio/tag/tagger_test.go

@@ -30,6 +30,7 @@ func TestToTagsTotalsAndSourceFields(t *testing.T) {
 		DiscNumber:          1,
 		DiscTotal:           2,
 		ISRC:                "USABC1234567",
+		InitialKey:          "Em",
 		ReplaygainTrackGain: "-7.25 dB",
 		ReplaygainAlbumGain: "-8.1 dB",
 		ReplaygainTrackPeak: "0.989",
@@ -49,6 +50,9 @@ func TestToTagsTotalsAndSourceFields(t *testing.T) {
 	if tags["isrc"] != "USABC1234567" {
 		t.Fatalf("isrc missing: %+v", tags)
 	}
+	if tags["INITIALKEY"] != "Em" {
+		t.Fatalf("INITIALKEY missing: %+v", tags)
+	}
 	if tags["source_platform"] != "QOBUZ" || tags["source_track_id"] != "t1" {
 		t.Fatalf("source tags missing: %+v", tags)
 	}