Returns a short-lived presigned URL for a file stored in Active Storage for
the company (e.g. a KYC document). The attachment is selected by the
required file_name query parameter, which must be one of the company's
allowed attachment keys. The allowed set depends on the company's country:
for Chile (and other non-MX countries) tax_folder, incorporation_document,
registration_certificate, power_structure, rut_certificate,
plh_contract_file, plh_kyc_file, plh_alliance_file,
plh_contract_file_signed, plh_kyc_file_signed, plh_alliance_file_signed;
for Mexico (MX) incorporation_document, address_file, cif_file,
majority_ownership_incorporation_file.