Operations can now create and edit a specification and its parameters
together, over the existing model, mirroring the admin's inline.
The approval half is deliberately held: the form does not expose status,
is_current, approved_by or approved_at, so a portal-created specification
is a draft and cannot be approved here. The edit screen warns when the
record is not a draft, because its parameters are the limits QC results
are judged against. Nothing is removed from the admin.
The parameter formset refuses an empty specification (with no parameters
every QC result would pass), a numeric parameter with no limits, and a
visual parameter with no allowed values.
