prediction: rewrite the prompting stack to create the ship computer as a second character, and let characters/agents operate autonomously with their own tasks and event queues

src/artifacts/mixxx.rs

@@ -27,11 +27,11 @@ impl DataSource for MixxxDB {
     type Args = MixxxQuery;
     type Error = MixxxError;
 
-    async fn synchronize(&mut self, _artifact: &mut Artifact) -> Result<Vec<Artifact>, Self::Error> {
+    async fn synchronize(&self, _artifact: &mut Artifact) -> Result<Vec<Artifact>, Self::Error> {
         Ok(vec![])
     }
 
-    async fn query(&mut self, args: &Self::Args) -> Result<Vec<Artifact>, Self::Error> {
+    async fn query(&self, args: &Self::Args) -> Result<Vec<Artifact>, Self::Error> {
         let mut ret = vec![];
         let playlist_name = args.playlist_name.as_str();
         log::info!("Loading Mixxx playlist {}", playlist_name);