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/frontend/views/PCForm.vue

@@ -223,6 +223,17 @@
           </div>
         </div>
 
+        <div class="form-group">
+          <label for="azuredeviceid">Azure Device ID</label>
+          <input
+            id="azuredeviceid"
+            v-model="form.azuredeviceid"
+            type="text"
+            class="form-control"
+            placeholder="Entra/Azure deviceId GUID (set by Azure imports)"
+          />
+        </div>
+
         <div class="form-group">
           <label>Remote Access Protocols</label>
           <div class="protocol-list">
@@ -383,6 +394,7 @@ const form = ref({
   locationid: '',
   osid: '',
   loggedinuser: '',
+  azuredeviceid: '',
   accessmethods: [],
   notes: '',
   mapx: null,
@@ -486,6 +498,7 @@ onMounted(async () => {
         locationid: pc.locationid || '',
         osid: ext.osid || '',
         loggedinuser: ext.loggedinuser || '',
+        azuredeviceid: ext.azuredeviceid || '',
         accessmethods: (pc.accessmethods || []).map(a => ({
           protocolid: a.protocolid,
           portoverride: a.portoverride ?? null
@@ -555,6 +568,7 @@ async function savePC() {
       locationid: form.value.locationid || null,
       osid: form.value.osid || null,
       loggedinuser: form.value.loggedinuser || null,
+      azuredeviceid: form.value.azuredeviceid || null,
       accessmethods: form.value.accessmethods,
       notes: form.value.notes || null,
       ipaddress: form.value.ipaddress || null,