Wire measuring tools into identifiers and global search

The measuringtools plugin was missing from two cross-cutting surfaces:
the asset-identifier matrix (no measuring_tool column or per-type
keys - gauge lab reference is their primary identifier) and global
search (results fell to a generic URL and gaugelabreference was never
searched). Measuring tools now have identifier toggles, gated
gauge-lab and maintenance-reference fields on their form and detail,
a search domain toggle, gage-tag search, and proper labels, routes,
and filter chips in search results.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/src/views/measuringtools/MeasuringToolDetail.vue

@@ -64,10 +64,14 @@
                 <span class="info-label">Name</span>
                 <span class="info-value">{{ tool.name }}</span>
               </div>
-              <div class="info-row" v-if="tool.gaugelabreference">
+              <div class="info-row" v-if="tool.gaugelabreference && isEnabled('gaugelabreference', 'measuring_tool')">
                 <span class="info-label">Gauge Lab Reference</span>
                 <span class="info-value mono">{{ tool.gaugelabreference }}</span>
               </div>
+              <div class="info-row" v-if="tool.maintenancereference && isEnabled('maintenancereference', 'measuring_tool')">
+                <span class="info-label">Maintenance Reference</span>
+                <span class="info-value mono">{{ tool.maintenancereference }}</span>
+              </div>
               <div class="info-row" v-if="tool.serialnumber">
                 <span class="info-label">Serial Number</span>
                 <span class="info-value mono">{{ tool.serialnumber }}</span>
@@ -167,9 +171,12 @@ import CustomFieldsSection from '../../components/CustomFieldsSection.vue'
 import WarrantyPanel from '../../components/WarrantyPanel.vue'
 import AssetRelationships from '../../components/AssetRelationships.vue'
 import { useWarrantyBadge } from '../../composables/warrantyBadge'
+import { useIdentifierFlags } from '../../composables/identifierSettings'
 
 const route = useRoute()
 
+const { isEnabled } = useIdentifierFlags()
+
 const loading = ref(true)
 const tool = ref(null)
 const { warranties } = useWarrantyBadge(() => tool.value?.assetid)