feat: recover failed scheduled uploads with bounded persistent retries [skip ci]

tests/test_display.py

@@ -71,22 +71,24 @@ def test_nested_overrides(service):
     assert service.registry.get("living-room").get_current_image() == 1
 
 
-def test_no_retry_unknown(service):
+def test_unknown_does_not_block_new_independent_upload(service):
     driver = service.registry.get("living-room")
+    attempts = []
 
-    def timeout(*a):
+    def timeout(*args):
+        attempts.append(args)
         raise FlowError(ErrorCode.WRITE_RESULT_UNKNOWN, "Write outcome unknown", 502)
 
     driver.upload = timeout
-    id = submit(service)
+    first = submit(service)
     service.process_one()
-    assert service.operation(id)["status"] == "UNKNOWN"
-    with pytest.raises(FlowError):
-        submit(service)
-    assert service.process_one() is False
-    assert service.reconcile(id)["resolved"] is False
-    assert service.reconcile(id, True)["resolved"] is True
-    assert service.operation(id)["status"] == "FAILED"
+    assert service.operation(first)["status"] == "UNKNOWN"
+    second = submit(service, priority=10)
+    assert second != first
+    assert service.process_one()
+    assert service.operation(first)["status"] == "FAILED"
+    assert service.operation(second)["status"] == "UNKNOWN"
+    assert len(attempts) == 2
 
 
 def test_restart_preserves_override(service):