Make gauge/maintenance identifiers per-asset-type and extend to all types

Optional asset identifiers (gauge lab reference, maintenance reference, FQDN)
were global per-identifier and only surfaced on equipment. Now they are
toggleable per asset type and rendered on every asset type.

- settings: replace 3 global identifier toggles with a per-type matrix. New
  keys identifier_<name>_<assettype>_enabled (3 identifiers x 4 types).
  IDENTIFIER_LABELS / IDENTIFIER_ASSETTYPES constants drive the seed (API seed
  and CLI seed settings).
- composable: identifierSettings now exposes isEnabled(name, assettype),
  per-type flag winning over the legacy global key, defaulting on.
- backend writes: computers, network, printers asset create + update now
  accept gaugelabreference and maintenancereference (equipment already did).
  Reads already flowed through Asset.to_dict.
- frontend: Settings page renders an identifier x asset-type toggle matrix.
  Equipment, PC, printer, network forms and detail pages show gauge/maintenance
  (and FQDN where applicable) gated by isEnabled(name, type).

Legacy global identifier_<name>_enabled keys are still honored as a fallback
for older installs. SystemSettings toggles upsert (create on 404) so a deploy
that has not re-seeded still works on first toggle.

144 tests pass, naming/style check green, frontend builds. Verified live:
matrix renders, PC form shows the fields, PUT persists gauge/maintenance on a
PC and reads back.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

plugins/computers/api/routes.py

@@ -328,6 +328,8 @@ def create_computer():
         assetnumber=data['assetnumber'],
         name=data.get('name'),
         serialnumber=data.get('serialnumber'),
+        gaugelabreference=data.get('gaugelabreference'),
+        maintenancereference=data.get('maintenancereference'),
         assettypeid=computer_type.assettypeid,
         statusid=data.get('statusid', 1),
         locationid=data.get('locationid'),
@@ -424,7 +426,8 @@ def update_computer(computer_id: int):
     changes = {}
 
     # Update asset fields
-    asset_fields = ['assetnumber', 'name', 'serialnumber', 'statusid',
+    asset_fields = ['assetnumber', 'name', 'serialnumber', 'gaugelabreference',
+                    'maintenancereference', 'statusid',
                     'locationid', 'businessunitid', 'mapx', 'mapy', 'notes', 'isactive']
     for key in asset_fields:
         if key in data:

plugins/network/api/routes.py

@@ -324,6 +324,8 @@ def create_network_device():
         assetnumber=data['assetnumber'],
         name=data.get('name'),
         serialnumber=data.get('serialnumber'),
+        gaugelabreference=data.get('gaugelabreference'),
+        maintenancereference=data.get('maintenancereference'),
         assettypeid=network_type.assettypeid,
         statusid=data.get('statusid', 1),
         locationid=data.get('locationid'),
@@ -406,7 +408,8 @@ def update_network_device(device_id: int):
     changes = {}
 
     # Update asset fields
-    asset_fields = ['assetnumber', 'name', 'serialnumber', 'statusid',
+    asset_fields = ['assetnumber', 'name', 'serialnumber', 'gaugelabreference',
+                    'maintenancereference', 'statusid',
                     'locationid', 'businessunitid', 'mapx', 'mapy', 'notes', 'isactive']
     for key in asset_fields:
         if key in data:

plugins/printers/api/asset_routes.py

@@ -285,6 +285,8 @@ def create_printer():
         assetnumber=data['assetnumber'],
         name=data.get('name'),
         serialnumber=data.get('serialnumber'),
+        gaugelabreference=data.get('gaugelabreference'),
+        maintenancereference=data.get('maintenancereference'),
         assettypeid=printer_type.assettypeid,
         statusid=data.get('statusid', 1),
         locationid=data.get('locationid'),
@@ -364,8 +366,9 @@ def update_printer(printer_id: int):
                 http_code=409
             )
 
-    # Update asset fields (gauge lab / maintenance refs are equipment-only)
-    asset_fields = ['assetnumber', 'name', 'serialnumber', 'statusid',
+    # Update asset fields (optional identifiers gated per-type in Settings)
+    asset_fields = ['assetnumber', 'name', 'serialnumber', 'gaugelabreference',
+                    'maintenancereference', 'statusid',
                     'locationid', 'businessunitid', 'mapx', 'mapy',
                     'notes', 'isactive']
     for key in asset_fields: