Added the watch and scheduler systems

src/entities/artist.rs

@@ -14,6 +14,9 @@ pub struct Model {
     pub top_songs: String,
     /// JSON-serialized Vec of similar artist info
     pub similar_artists: String,
+    pub monitored: bool,
+    #[sea_orm(nullable)]
+    pub last_checked_at: Option<chrono::NaiveDateTime>,
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]