Fix location dropdowns silently truncating at the 100-row backend cap

The backend clamps perpage to MAX_PAGE_SIZE (100), so location selectors that requested a large page received only the first page and still got a 200. Late-alphabet locations (past ~C5W) simply went missing from every module's dropdown, and no error surfaced.

Add locationsApi.listAll, which pages through the full set via fetchAllPages, matching the established machines/printers pattern, and switch every location selector consumer to it.

plugins/measuringtools/frontend/views/MeasuringToolForm.vue

@@ -181,13 +181,13 @@ onMounted(async () => {
     const [typesResponse, statusResponse, locResponse, buResponse, assetTypesResponse] = await Promise.all([
       measuringtoolsApi.types.list({ perpage: 200 }),
       assetsApi.statuses.list(),
-      locationsApi.list({ perpage: 500 }),
+      locationsApi.listAll(),  // backend caps perpage at 100; page through all
       businessunitsApi.list({ perpage: 500 }),
       assetsApi.types.list(),
     ])
     types.value = typesResponse.data.data || []
     statuses.value = statusResponse.data.data || []
-    locations.value = locResponse.data.data || []
+    locations.value = locResponse || []
     businessunits.value = buResponse.data.data || []
 
     const assetType = (assetTypesResponse.data.data || []).find(a => a.assettype === 'measuring_tool')