Fix: Graphql error: Cannot query field 'meta' on type 'SourceSolutionUnion

[chrisbc]

DEBUG:nshm_toshi_client.toshi_client_base:variable_values: {'id': 'RmlsZToxMjEwMzM='}
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/app/nzshm-runzi/runzi/execute/openquake/oq_hazard_task.py", line 348, in <module>
    task.run(**config)
  File "/app/nzshm-runzi/runzi/execute/openquake/oq_hazard_task.py", line 204, in run
    sources_filepath = adapter.write_config(cache_folder, sources_folder)
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/openquake/lib/python3.11/site-packages/nzshm_model/psha_adapter/openquake/simple_nrml.py", line 221, in write_config
    source_map = source_map or self.unpack_resources(cache_folder, target_folder)
                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/openquake/lib/python3.11/site-packages/nzshm_model/psha_adapter/openquake/simple_nrml.py", line 237, in unpack_resources
    for file_id, filepath, uncertainty_model in self.fetch_resources(cache_folder):
  File "/opt/openquake/lib/python3.11/site-packages/nzshm_model/psha_adapter/openquake/simple_nrml.py", line 272, in fetch_resources
    filepath = fetch_toshi_source(um.toshi_nrml_id, destination)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/openquake/lib/python3.11/site-packages/nzshm_model/psha_adapter/openquake/simple_nrml.py", line 28, in fetch_toshi_source
    file_detail = api.get_source(file_id)