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>

shopdb/core/api/settings.py

@@ -53,7 +53,8 @@ IDENTIFIER_LABELS = {
     'maintenancereference': 'Maintenance Reference',
     'fqdn': 'FQDN / hostname',
 }
-IDENTIFIER_ASSETTYPES = ['machine', 'computer', 'printer', 'network_device']
+IDENTIFIER_ASSETTYPES = ['machine', 'computer', 'printer', 'network_device',
+                         'measuring_tool']
 
 # Global-search result types that can be toggled on/off independently of whether
 # the owning plugin is enabled. Keys match the `type` field on search results;
@@ -67,6 +68,7 @@ SEARCH_DOMAINS = {
     'computer': 'PCs',
     'printer': 'Printers',
     'network_device': 'Network Devices',
+    'measuring_tool': 'Measuring Tools',
     'notification': 'Notifications',
     'subnet': 'Subnets',
 }