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/composables/identifierSettings.js

@@ -14,7 +14,7 @@ const state = reactive({
 
 let inflight = null
 
-const KEY_RE = /^identifier_(.+?)(?:_(machine|computer|printer|network_device))?_enabled$/
+const KEY_RE = /^identifier_(.+?)(?:_(machine|computer|printer|network_device|measuring_tool))?_enabled$/
 
 function applySetting(key, value) {
   const match = KEY_RE.exec(key)

frontend/src/composables/systemSettings.js

@@ -36,7 +36,8 @@ export const assetTypeCols = [
   { key: 'machine', label: 'Machine' },
   { key: 'computer', label: 'PC' },
   { key: 'printer', label: 'Printer' },
-  { key: 'network_device', label: 'Network' }
+  { key: 'network_device', label: 'Network' },
+  { key: 'measuring_tool', label: 'Measuring Tool' }
 ]
 
 // Global-search domain toggles: keys follow search_<type>_enabled.
@@ -49,6 +50,7 @@ export const searchDomains = [
   { key: 'computer', label: 'PCs' },
   { key: 'printer', label: 'Printers' },
   { key: 'network_device', label: 'Network Devices' },
+  { key: 'measuring_tool', label: 'Measuring Tools' },
   { key: 'notification', label: 'Notifications' },
   { key: 'subnet', label: 'Subnets' }
 ]
@@ -153,7 +155,7 @@ export function useSystemSettings() {
       for (const setting of data.data) {
         if (setting.key in settings) {
           settings[setting.key] = setting.value
-        } else if (/^identifier_.+_(machine|computer|printer|network_device)_enabled$/.test(setting.key)) {
+        } else if (/^identifier_.+_(machine|computer|printer|network_device|measuring_tool)_enabled$/.test(setting.key)) {
           identifierMatrix[setting.key] = setting.value !== false
         } else if (/^search_.+_enabled$/.test(setting.key)) {
           searchMatrix[setting.key] = setting.value !== false