(bugfix) Enable rsync progress output for live real runs

Default queued and management-command backups to verbose rsync output so live
run views show progress for long-running real backups, matching dry-run
visibility.

Add a quiet-rsync escape hatch for operators who intentionally want less noisy
real-run logs.

src/pobsync_backend/tests/test_backup_worker.py

@@ -39,13 +39,20 @@ class BackupWorkerTests(TestCase):
             },
         )
 
-    def test_queue_backup_run_can_request_verbose_output(self) -> None:
+    def test_queue_backup_run_enables_verbose_output_by_default(self) -> None:
         host = HostConfig.objects.create(host="web-01", address="web-01.example.test")
 
-        run = queue_backup_run(host=host, verbose_output=True)
+        run = queue_backup_run(host=host)
 
         self.assertTrue(run.result["requested"]["verbose_output"])
 
+    def test_queue_backup_run_can_disable_verbose_output(self) -> None:
+        host = HostConfig.objects.create(host="web-01", address="web-01.example.test")
+
+        run = queue_backup_run(host=host, verbose_output=False)
+
+        self.assertFalse(run.result["requested"]["verbose_output"])
+
     def test_worker_executes_next_queued_run(self) -> None:
         with TemporaryDirectory() as tmp:
             backup_root = Path(tmp) / "backups"