The dot-compliance-remediation pipeline seeds filing_status.pdf_minio_path on
every order in a batch, but only MCS-150-producing slugs (mcs150-update,
dot-registration, usdot-reactivation, dot-full-compliance) ever generate it.
For admin-assisted services like UCR it was a phantom 'Prepared filing PDF /
not generated yet' row. Gate the prepared-filing artifacts on FORM_PRODUCING_SLUGS
(mirrors the worker's MCS150_FORM_SLUGS) and give the empty state a clearer
explanation.
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