The /policies/{policy_id}/tailorings/{tailoring_id}/tailoring_file.json endpoint returns empty body with a status code 204 if no customizations were done to the policy. We instead expect empty, but still valid JSON string. This causes our image builds to fail during autotailoring in osbuild:

...
File \\\"/usr/lib64/python3.12/json/decoder.py\\\", line 356, in raw_decode\
    raise JSONDecodeError(\\\"Expecting value\\\", s, err.value) from None\
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
.... 

(Foot note: This behaviour is different if we request TOML tailoring file, in that format we actually get full tailoring file even if no customizations were done to the policy)