fixed up the featured artist thing

shanty-data/src/mb_local.rs

@@ -475,6 +475,7 @@ impl MetadataFetcher for LocalMusicBrainzFetcher {
                     secondary_types,
                     first_release_date: row.get(4)?,
                     first_release_mbid: row.get(5)?,
+                    featured: false, // Local DB only stores primary-credit releases
                 })
             })
             .map_err(|e| DataError::Other(e.to_string()))?

shanty-data/src/musicbrainz.rs

@@ -345,7 +345,7 @@ impl MetadataFetcher for MusicBrainzFetcher {
     ) -> DataResult<Vec<ReleaseGroupEntry>> {
         // Fetch album, single, and EP release groups
         let url = format!(
-            "{BASE_URL}/release-group?artist={artist_mbid}&type=album|single|ep&fmt=json&limit=100"
+            "{BASE_URL}/release-group?artist={artist_mbid}&type=album|single|ep&inc=artist-credits&fmt=json&limit=100"
         );
         let resp: MbReleaseGroupResponse = self.get_json(&url).await?;
 
@@ -353,7 +353,10 @@ impl MetadataFetcher for MusicBrainzFetcher {
             .release_groups
             .unwrap_or_default()
             .into_iter()
-            .map(|rg| ReleaseGroupEntry {
+            .map(|rg| {
+                let primary = extract_artist_credit(&rg.artist_credit);
+                let featured = primary.1.as_deref() != Some(artist_mbid);
+                ReleaseGroupEntry {
                     mbid: rg.id,
                     title: rg.title,
                     primary_type: rg.primary_type,
@@ -362,6 +365,8 @@ impl MetadataFetcher for MusicBrainzFetcher {
                     first_release_mbid: rg
                         .releases
                         .and_then(|r| r.into_iter().next().map(|rel| rel.id)),
+                    featured,
+                }
             })
             .collect())
     }
@@ -538,6 +543,8 @@ struct MbReleaseGroup {
     #[serde(rename = "first-release-date")]
     first_release_date: Option<String>,
     releases: Option<Vec<MbReleaseGroupRelease>>,
+    #[serde(rename = "artist-credit")]
+    artist_credit: Option<Vec<MbArtistCredit>>,
 }
 
 #[derive(Deserialize)]

shanty-data/src/types.rs

@@ -96,6 +96,9 @@ pub struct ReleaseGroupEntry {
     pub first_release_date: Option<String>,
     /// MBID of the first release in this group (for fetching tracks).
     pub first_release_mbid: Option<String>,
+    /// True if the queried artist is not the primary credit on this release group.
+    #[serde(default)]
+    pub featured: bool,
 }
 
 /// A track within a release.