Wipe data from song queue (#135)

* Added TODOs for later

* Added endpoint to wipe data from song queue

* Migration changes

* Syntax error fix

* Added and linked endpoint

* Added test

* Warning fixes

* Code formatting

src/callers/metadata.rs

@@ -1,3 +1,4 @@
+// TODO: Explicitly make this module target queueing a song's metadata
 pub mod request {
     use serde::{Deserialize, Serialize};