init(models): add alias and kiroku models

internal/models/models.go

@@ -39,3 +39,15 @@ type Track struct {
 	Credits     []Credit       `json:"credits"`
 	Notes       sql.NullString `json:"notes"`
 }
+
+type Alias struct {
+	ID     string `json:"id"`
+	Track  Track  `json:"track"`
+	Name   string `json:"name"`
+	Artist string `json:"artist"`
+}
+
+type Kiroku struct {
+	Alias    Alias     `json:"alias"`
+	Datetime time.Time `json:"datetime"`
+}