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/SearchResults.vue

@@ -116,6 +116,7 @@ const typeLabels = {
   knowledgebase: 'KB',
   printer: 'Printer',
   network_device: 'Network',
+  measuring_tool: 'Measuring Tool',
   employee: 'Employee',
   notification: 'Notice',
   subnet: 'Subnet'
@@ -127,6 +128,7 @@ const filterTypeMap = {
   computers: ['computer'],
   printers: ['printer'],
   network: ['network_device', 'subnet'],
+  measuringtools: ['measuring_tool'],
   applications: ['application'],
   knowledgebase: ['knowledgebase'],
   notifications: ['notification'],
@@ -139,6 +141,7 @@ const filterList = [
   { key: 'computers', label: 'PCs' },
   { key: 'printers', label: 'Printers' },
   { key: 'network', label: 'Network' },
+  { key: 'measuringtools', label: 'Measuring Tools' },
   { key: 'applications', label: 'Apps' },
   { key: 'knowledgebase', label: 'KB' },
   { key: 'notifications', label: 'Notices' },
@@ -413,6 +416,11 @@ watch(results, () => {
   color: #f57f17;
 }
 
+.result-type.measuring_tool {
+  background: #e0f7fa;
+  color: #00838f;
+}
+
 .result-type.employee {
   background: #e0f2f1;
   color: #00695c;
@@ -513,6 +521,11 @@ watch(results, () => {
     color: #ffd54f;
   }
 
+  .result-type.measuring_tool {
+    background: rgba(0, 131, 143, 0.2);
+    color: #80deea;
+  }
+
   .result-type.employee {
     background: rgba(0, 105, 92, 0.2);
     color: #80cbc4;