Every TIN resolved to the same canned company, so the premise of both manual
routes — eTrade holds nothing — could not be reached at all, and neither could
the dead end an ordinary company hits on a TIN with no trade licence.
The answer now follows the TIN's leading digit, so a spec picks its outcome by
picking its number and no per-spec stubbing is needed: 9… returns a
registration with no businesses (the co-operative / investor case, where the
API's resolveCompanyData finds no licence), 8… 404s the registration lookup
entirely, anything else behaves as before.
