Fix: place consumed files before running the post-consume script

The consumer's storage phase opens its own file move scope, which nests under the consume task's scope. Moves requested while storing the document therefore stayed pending until the task ended, and the post-consume script could be handed a path from before the move.

The consumer now flushes the pending file moves once after the storage block, outside the media lock and the transaction, and before the post-consume script runs.

src/documents/tests/test_consumer.py

@@ -250,6 +250,38 @@ class TestConsumer(
         assert document is not None
         self.assertIsFile(document.source_path)
 
+    @mock.patch("documents.consumer.load_classifier")
+    def test_consume_places_file_before_post_consume_script(self, m) -> None:
+        """
+        GIVEN:
+            - A new document to consume
+        WHEN:
+            - It is consumed
+        THEN:
+            - Pending file moves are flushed before the post-consume script runs
+        """
+        m.return_value = MagicMock()
+        order = MagicMock()
+
+        with (
+            mock.patch(
+                "documents.consumer.flush_pending_file_moves",
+                order.flush,
+            ),
+            mock.patch.object(
+                ConsumerPlugin,
+                "run_post_consume_script",
+                order.script,
+            ),
+        ):
+            with self.get_consumer(self.get_test_file()) as consumer:
+                consumer.run()
+
+        self.assertEqual(
+            [c[0] for c in order.mock_calls],
+            ["flush", "script"],
+        )
+
     @mock.patch("documents.consumer.load_classifier")
     def test_consume_version_takes_media_lock_outside_transaction(self, m) -> None:
         """