Seed an organization-wide Area catalogue (East, Central, West, California)
with stable ids, add a nullable AreaId to VendorCompany, allow only Admins
to change it through the roster endpoints, expose areas facet metadata and
an areas[n] company-directory filter with the __unassigned__ sentinel.
SH-44 and SH-82 both left "blocks, or requires explicit confirmation" to
be decided with the team, and the implementation took the blocking
branch. SH-254 settles it the other way: the approved design offers
"Deactivate anyway" beside the list of open work orders.
Deactivation with open work orders is now permitted, but only when the
caller says it has shown them: ConfirmOpenWorkOrders on the update DTO
and a confirmOpenWorkOrders query parameter on the delete route. Absent
the flag the existing guard still throws, so nothing deactivates by
accident and no caller loses the check by omission.
confirmOpenWorkOrders is a required parameter on DeleteVendorAsync
rather than an optional one, so every call site states its intent.
