Simplified and more aggressive worker exit logic

src/table/gc.rs

@@ -348,10 +348,7 @@ where
 		}
 	}
 
-	async fn wait_for_work(&mut self, must_exit: &watch::Receiver<bool>) -> WorkerState {
-		if *must_exit.borrow() {
-			return WorkerState::Done;
-		}
+	async fn wait_for_work(&mut self) -> WorkerState {
 		tokio::time::sleep(self.wait_delay).await;
 		WorkerState::Busy
 	}

src/table/merkle.rs

@@ -340,10 +340,7 @@ where
 		.unwrap()
 	}
 
-	async fn wait_for_work(&mut self, must_exit: &watch::Receiver<bool>) -> WorkerState {
-		if *must_exit.borrow() {
-			return WorkerState::Done;
-		}
+	async fn wait_for_work(&mut self) -> WorkerState {
 		select! {
 			_ = tokio::time::sleep(Duration::from_secs(60)) => (),
 			_ = self.0.data.merkle_todo_notify.notified() => (),

src/table/queue.rs

@@ -71,10 +71,7 @@ where
 		Ok(WorkerState::Busy)
 	}
 
-	async fn wait_for_work(&mut self, must_exit: &watch::Receiver<bool>) -> WorkerState {
-		if *must_exit.borrow() {
-			return WorkerState::Done;
-		}
+	async fn wait_for_work(&mut self) -> WorkerState {
 		select! {
 			_ = tokio::time::sleep(Duration::from_secs(600)) => (),
 			_ = self.0.data.insert_queue_notify.notified() => (),

src/table/sync.rs

@@ -593,10 +593,7 @@ impl<F: TableSchema + 'static, R: TableReplication + 'static> Worker for SyncWor
 		}
 	}
 
-	async fn wait_for_work(&mut self, must_exit: &watch::Receiver<bool>) -> WorkerState {
-		if *must_exit.borrow() {
-			return WorkerState::Done;
-		}
+	async fn wait_for_work(&mut self) -> WorkerState {
 		select! {
 			s = self.add_full_sync_rx.recv() => {
 				if let Some(()) = s {