When a copper fill zone shares the same name as a placement rule area, the multichannel tool's enclosedByArea() queries would match items in both zones. This caused vias and other routing in the reference area to be incorrectly removed during repeat layout operations. Changed findOtherItemsInRuleArea() and findRoutingInRuleArea() to use the zone's UUID instead of its name when constructing enclosedByArea() expressions. Fixes https://gitlab.com/kicad/code/kicad/-/issues/21184