ui: fix error getting task logs when refreshing page

.changelog/28137.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+ui: fixes an issue where streaming task logs would error
+```

ui/app/routes/allocations/allocation/task/logs.js

@@ -4,9 +4,20 @@
  */
 
 import Route from '@ember/routing/route';
+import { service } from '@ember/service';
 
 export default class LogsRoute extends Route {
+  @service abilities;
   model() {
-    return this.modelFor('allocations.allocation.task');
+    const task = this.modelFor('allocations.allocation.task');
+    // streaming logs can require the node object to be loaded
+    // in order for the logUrl() function to correctly use the
+    // allocation.node.httpAddr property.
+    // An alternative option here is to use just allocation.node
+    // as the computed property for logUrl()
+    if (this.abilities.can('read client')) {
+      return task && task.get('allocation.node').then(() => task);
+    }
+    return task;
   }
 }