chore(traceability): shift this branch's ids clear of master's

Master allocated DR-224 and UT-211 while this branch was in flight — the third
collision on this work. Everything here moves up by one: DR-224..236 become
DR-225..237, UT-211..213 become UT-212..214. UR-079, UR-080 and IR-033 were
still free and are unchanged.

Mechanical, and matched on each row's own text rather than on its number, so a
row cannot be shifted twice or the wrong one caught. Master's DR-224 (the
background-audio toggle) and UT-211 are untouched.

src-tauri/src/player/mod.rs

@@ -24,7 +24,7 @@ pub mod android;
 #[cfg(target_os = "linux")]
 pub mod mpv_backend;
 
-/// The native video surface mpv renders into (UR-080 / DR-230).
+/// The native video surface mpv renders into (UR-080 / DR-231).
 ///
 /// Linux-gated for now because the surface is GTK. Everything *around* it — the
 /// render context, its lifetime, frame pacing, the device profile — is