Create a plain lab test

curl --location --request POST '/test-result/plain' \
--header 'x-api-key: {{api-key}}' \
--header 'x-docus-key: {{docus-key}}' \
--header 'x-auth-secret: {{auth-secret}}' \
--header 'x-team-id: {{team-id}}' \
--header 'Content-Type: application/json' \
--data-raw '{
    "visit_id": "visit_abc123",
    "test_result_id": "test_result_abc123",
    "patient_id": "patient_xyz789",
    "biomarker_group_id": "biomarker_group_def456",
    "physician_email": "doctor@example.com",
    "attachment_file_base64": "JVBERi0xLjQKJ...",
    "attachment_file_name": "cbc_report.pdf",
    "test_result": "Patient shows elevated glucose levels above normal threshold."
}'