Use different seeds for retries

tests/test_label_timeouts.py

@@ -9,6 +9,7 @@ from unittest.mock import Mock, patch
 
 from copienator import CliError, EvaluationWorkspace, ExitCode
 from copienator.commands import gemini_for_labels as labels
+from copienator.copy_errors import mark_copy_error
 
 
 class LabelTimeoutTests(unittest.TestCase):
@@ -73,6 +74,25 @@ class LabelTimeoutTests(unittest.TestCase):
             self.assertEqual(options.retry_options.attempts, 1)
         self.assertTrue((self.workspace.copies_dir / "Copie01_01.json").exists())
 
+    def test_flagged_reruns_get_fresh_seeds_and_replace_existing_results(self):
+        pdf = self.workspace.copies_dir / "Copie01.pdf"
+        pdf.touch()
+        mark_copy_error(self.workspace, pdf, "Review", source="plotting")
+        self.client.models.generate_content.return_value = self.response
+        with patch.object(labels, "selected_images", return_value=(self.images[:1], [])), \
+                patch.object(labels, "fresh_seed", side_effect=[101, 202]), \
+                patch.object(labels.config, "THINKING_LEVEL_FOR_LABEL", "medium"):
+            for _ in range(2):
+                self.assertEqual(labels.run(
+                    self.workspace, [], marked=True, client=self.client,
+                    sleep=lambda _: None, max_workers=1,
+                ), ExitCode.SUCCESS)
+        configs = [call.kwargs["config"]
+                   for call in self.client.models.generate_content.call_args_list]
+        self.assertEqual([cfg.seed for cfg in configs], [101, 202])
+        self.assertEqual([cfg.thinking_config.thinking_level.value for cfg in configs],
+                         ["MEDIUM", "MEDIUM"])
+
     def test_retries_use_low_thinking_and_next_image_restores_configured_level(self):
         self.client.models.generate_content.side_effect = [
             TimeoutError(), TimeoutError(), self.response, self.response,
@@ -87,6 +107,8 @@ class LabelTimeoutTests(unittest.TestCase):
             ["MEDIUM", "LOW", "LOW", "MEDIUM"],
         )
         self.assertTrue(all(cfg.http_options.timeout == 80_000 for cfg in configs))
+        self.assertNotEqual(configs[0].seed, configs[1].seed)
+        self.assertNotEqual(configs[1].seed, configs[2].seed)
 
     def test_exhaustion_defers_dependent_pages_but_other_copies_finish_and_resume(self):
         self.client.models.generate_content.side_effect = [