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/utils/assetTypes.js

@@ -9,6 +9,7 @@ const ASSET_TYPE_LABELS = {
   'printer': 'Printers',
   'network_device': 'Network Devices',
   'network device': 'Network Devices',
+  'measuring_tool': 'Measuring Tools',
 }
 
 const ASSET_TYPE_ROUTES = {
@@ -17,6 +18,7 @@ const ASSET_TYPE_ROUTES = {
   'printer': '/printers',
   'network_device': '/network',
   'network device': '/network',
+  'measuring_tool': '/measuringtools',
 }
 
 // Plugin-specific id field inside asset.typedata for each asset type.
@@ -26,6 +28,7 @@ const ASSET_TYPE_ID_KEYS = {
   'printer': 'printerid',
   'network_device': 'networkdeviceid',
   'network device': 'networkdeviceid',
+  'measuring_tool': 'measuringtoolid',
 }
 
 function titleCase(text) {