feat(update): add Onebox self-upgrade flow

ts/opsserver/handlers/status.handler.ts

@@ -2,6 +2,7 @@ import * as plugins from '../../plugins.ts';
 import type { OpsServer } from '../classes.opsserver.ts';
 import * as interfaces from '../../../ts_interfaces/index.ts';
 import { requireAdminIdentity } from '../helpers/guards.ts';
+import { getErrorMessage } from '../../utils/error.ts';
 
 export class StatusHandler {
   public typedrouter = new plugins.typedrequest.TypedRouter();
@@ -22,5 +23,20 @@ export class StatusHandler {
         },
       ),
     );
+
+    this.typedrouter.addTypedHandler(
+      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_StartOneboxUpgrade>(
+        'startOneboxUpgrade',
+        async (dataArg) => {
+          await requireAdminIdentity(this.opsServerRef.adminHandler, dataArg);
+          try {
+            const upgrade = await this.opsServerRef.oneboxRef.updateManager.startDetachedUpgrade();
+            return { upgrade };
+          } catch (error) {
+            throw new plugins.typedrequest.TypedResponseError(getErrorMessage(error));
+          }
+        },
+      ),
+    );
   }
 }