Asset-side printer save, status CRUD, real printer types, network fix

- Printers save through the asset blueprint (PUT /printers) instead of the
  legacy machines API; restrict supply-model picker to printer models.
- Asset statuses get full CRUD (PUT/DELETE with in-use guard); canonical set.
- Printer types reseeded to a real classification set + list filter.
- Equipment accepts gauge/maintenance references.
- Fix network list emitting network_device instead of networkdevice (View 404).

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

plugins/equipment/api/routes.py

@@ -282,6 +282,8 @@ def create_equipment():
     asset = Asset(
         assetnumber=data['assetnumber'],
         name=data.get('name'),
+        gaugelabreference=data.get('gaugelabreference'),
+        maintenancereference=data.get('maintenancereference'),
         serialnumber=data.get('serialnumber'),
         assettypeid=equipment_type.assettypeid,
         statusid=data.get('statusid', 1),
@@ -357,8 +359,10 @@ def update_equipment(equipment_id: int):
     changes = {}
 
     # Update asset fields
-    asset_fields = ['assetnumber', 'name', 'serialnumber', 'statusid',
-                    'locationid', 'businessunitid', 'mapx', 'mapy', 'notes', 'isactive']
+    asset_fields = ['assetnumber', 'name', 'gaugelabreference',
+                    'maintenancereference', 'serialnumber', 'statusid',
+                    'locationid', 'businessunitid', 'mapx', 'mapy',
+                    'notes', 'isactive']
     for key in asset_fields:
         if key in data:
             old_val = getattr(asset, key)