Update for the "full flow"

src/provider.rs

@@ -99,4 +99,19 @@ pub trait MetadataProvider: Send + Sync {
         artist_mbid: &str,
         limit: u32,
     ) -> impl std::future::Future<Output = TagResult<Vec<DiscographyEntry>>> + Send;
+
+    fn get_release_tracks(
+        &self,
+        release_mbid: &str,
+    ) -> impl std::future::Future<Output = TagResult<Vec<ReleaseTrack>>> + Send;
+}
+
+/// A track within a release.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ReleaseTrack {
+    pub recording_mbid: String,
+    pub title: String,
+    pub track_number: Option<i32>,
+    pub disc_number: Option<i32>,
+    pub duration_ms: Option<u64>,
 }