fixed : tests

src/server/services/progress_service.py

@@ -79,7 +79,8 @@ class ProgressUpdate:
             "percent": round(self.percent, 2),
             "current": self.current,
             "total": self.total,
-            "metadata": self.metadata,
+            # Make a copy to prevent mutation issues
+            "metadata": self.metadata.copy(),
             "started_at": self.started_at.isoformat(),
             "updated_at": self.updated_at.isoformat(),
         }