fix: terminate ephemeral and location loop immediately on channel close

When scheduler is destroyed, e.g. during a key import,
there is some time between destroying the interrupt channel
and the loop task.

To avoid busy looping, tasks should terminate if
receiving from the interrupt loop fails
instead of treating it as the interrupt.

src/location.rs

@@ -679,7 +679,21 @@ pub(crate) async fn location_loop(context: &Context, interrupt_receiver: Receive
             "Location loop is waiting for {} or interrupt",
             duration_to_str(duration)
         );
-        timeout(duration, interrupt_receiver.recv()).await.ok();
+        match timeout(duration, interrupt_receiver.recv()).await {
+            Err(_err) => {
+                info!(context, "Location loop timeout.");
+            }
+            Ok(Err(err)) => {
+                warn!(
+                    context,
+                    "Interrupt channel closed, location loop exits now: {err:#}."
+                );
+                return;
+            }
+            Ok(Ok(())) => {
+                info!(context, "Location loop received interrupt.");
+            }
+        }
     }
 }