Preload callback processor class to prevent Pydantic Deserialization Error (#12776)

enterprise/saas_server.py

@@ -78,8 +78,15 @@ base_app.include_router(shared_event_router)
 
 # Add GitHub integration router only if GITHUB_APP_CLIENT_ID is set
 if GITHUB_APP_CLIENT_ID:
+    # Make sure that the callback processor is loaded here so we don't get an error when deserializing
+    from integrations.github.github_v1_callback_processor import (  # noqa: E402
+        GithubV1CallbackProcessor,
+    )
     from server.routes.integration.github import github_integration_router  # noqa: E402
 
+    # Bludgeon mypy into not deleting my import
+    logger.debug(f'Loaded {GithubV1CallbackProcessor.__name__}')
+
     base_app.include_router(
         github_integration_router
     )  # Add additional route for integration webhook events