A reference number (refnr), e.g. "10001-1002716922-S" or a
purely numeric "1002716922", as returned in a search result's refnr
field. It is base64-encoded into the API's encryptedJobCode for you.
As a convenience, an already-base64-encoded encryptedJobCode is passed
through unchanged. Detection is exact (not charset sniffing): the input is
only treated as pre-encoded when base64-decoding it yields a string that
matches the refnr pattern and re-encodes to the original — so a refnr such
as "1002716922", which is NOT base64 of a refnr, is correctly encoded.
Full details for one job.