UnitPickList.GetVariantCriteria put the value of a "customerid:<value>"
variant from the request into the query unparsed, reachable by any login
(security review F43, found during case 4712). The value is now parsed as a
long; anything else means no restriction, as 0 already did. The client's
format ("customerid: 5") still works.
Checked: new test fails on the old code, passes now; pick-list tests 10/10.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
