fix(platform/copilot): add SuggestedGoalResponse to ToolResponseUnion for OpenAPI schema

Adds SuggestedGoalResponse to the ToolResponseUnion in routes.py so it is
included in the generated OpenAPI schema. Regenerates openapi.json from the
live backend spec.

autogpt_platform/backend/backend/api/features/chat/routes.py

@@ -49,6 +49,7 @@ from .tools.models import (
     OperationPendingResponse,
     OperationStartedResponse,
     SetupRequirementsResponse,
+    SuggestedGoalResponse,
     UnderstandingUpdatedResponse,
 )
 from .tracking import track_user_message
@@ -1051,6 +1052,7 @@ ToolResponseUnion = (
     | AgentPreviewResponse
     | AgentSavedResponse
     | ClarificationNeededResponse
+    | SuggestedGoalResponse
     | BlockListResponse
     | BlockDetailsResponse
     | BlockOutputResponse