fixup audio improperly categorized

crates/cli/production/db-cleanup/src/operations/migrate_media_files_enum_values/migrate_media_files_enum_values.rs

@@ -31,7 +31,7 @@ pub async fn migrate_media_files_enum_values(_args: &Args, mysql: &Pool<MySql>)
     "#.to_string(),
   };
 
-  let query_pair = QueryPair {
+  let _query_pair = QueryPair {
     count_query: r#"
       select count(*) as record_count
       from media_files
@@ -47,6 +47,28 @@ pub async fn migrate_media_files_enum_values(_args: &Args, mysql: &Pool<MySql>)
     "#.to_string(),
   };
 
+  //  +--------------+
+  //  | record_count |
+  //  +--------------+
+  //  |     20570300 |
+  //  +--------------+
+  //  1 row in set (42.86 sec)
+  let query_pair = QueryPair {
+    count_query: r#"
+      select count(*) as record_count
+      from media_files
+      where media_class = "unknown"
+      and media_type = "audio"
+    "#.to_string(),
+    migrate_query: r#"
+      update media_files
+      set media_class = "audio"
+      where media_class = "unknown"
+      and media_type = "audio"
+      limit 50000
+    "#.to_string(),
+  };
+
   query_pair.run_migration(mysql).await?;
 
   Ok(())