add Entra device identity to computers and Azure/Thor import sources

PC records now carry Entra/Azure device identity so imported machines keep a durable link back to their directory object instead of matching on hostname alone. Adds azuredeviceid, azureobjectid, and azuredevicecategory to the Computer model with matching migrations, surfaces them read-only in PCDetail as an Entra Device Info card, and lets PCForm edit the device id directly. The computers plugin registers a machineassetnumber import hook that reconciles PC-to-machine links during bulk import and warns on unresolved or conflicting relationships.

Adds importsources adapters that normalize Azure device-group and Thor PC inventory exports into canonical ShopDB CSVs via hostname alignment, exposes register_import_hook and RowWarning on the shopdb.api contract surface (contract 0.21.0), and refreshes the Import Site Assets page with clearer source instructions. Includes reconcile_locations maintenance script and coverage for the new import paths.

plugins/computers/api/routes.py

@@ -582,6 +582,9 @@ def create_computer():
         vendorid=data.get('vendorid'),
         modelnumberid=data.get('modelnumberid'),
         loggedinuser=data.get('loggedinuser'),
+        azuredeviceid=data.get('azuredeviceid'),
+        azureobjectid=data.get('azureobjectid'),
+        azuredevicecategory=data.get('azuredevicecategory'),
         lastreporteddate=data.get('lastreporteddate'),
         lastboottime=data.get('lastboottime')
     )
@@ -686,8 +689,9 @@ def update_computer(computer_id: int):
 
     # Update computer fields
     computer_fields = ['computertypeid', 'hostname', 'osid', 'vendorid',
-                       'modelnumberid', 'loggedinuser', 'lastreporteddate',
-                       'lastboottime']
+                       'modelnumberid', 'loggedinuser', 'azuredeviceid',
+                       'azureobjectid', 'azuredevicecategory',
+                       'lastreporteddate', 'lastboottime']
     for key in computer_fields:
         if key in data:
             old_val = getattr(comp, key)