Automate post-import refresh and validation workflow

tests/test_event_outbox_migration.py

@@ -0,0 +1,18 @@
+import unittest
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+MIGRATION = ROOT / "plugins" / "redmine_event_outbox" / "db" / "migrate" / "001_create_event_outbox_events.rb"
+
+
+class EventOutboxMigrationTest(unittest.TestCase):
+    def test_create_table_migration_is_idempotent_for_imported_dev_clone(self):
+        source = MIGRATION.read_text()
+
+        self.assertIn("table_exists?(:event_outbox_events)", source)
+        self.assertIn("return if table_exists?(:event_outbox_events)", source)
+
+
+if __name__ == "__main__":
+    unittest.main()