chore: migrate google-cloud-maintenance-api to librarian (#8561)

Author: jskeet

librarian.yaml

@@ -1011,9 +1011,8 @@ libraries:
       - path: google/cloud/maintenance/api/v1
       - path: google/cloud/maintenance/api/v1beta
     copyright_year: "2026"
-    skip_generate: true
     nodejs:
-      default_version: v1beta
+      default_version: v1
   - name: google-cloud-managedidentities
     version: 4.2.2
     apis:

packages/google-cloud-maintenance-api/.OwlBot.yaml

@@ -1,16 +1,16 @@
 {
+    "api_description": "The Maintenance API provides a centralized view of planned disruptive\nmaintenance events across supported Google Cloud products. It offers users\nvisibility into upcoming, ongoing, and completed maintenance, along with\ncontrols to manage certain maintenance activities, such as maintenance\nwindows, rescheduling, and on-demand updates.",
     "api_id": "maintenance.googleapis.com",
     "api_shortname": "maintenance",
-    "client_documentation": "https://cloud.google.com/nodejs/docs/reference/maintenance/latest",
-    "default_version": "v1beta",
+    "client_documentation": "https://cloud.google.com/nodejs/docs/reference/maintenance-api/latest",
+    "default_version": "v1",
     "distribution_name": "@google-cloud/maintenance-api",
-    "issue_tracker": "https://github.com/googleapis/google-cloud-node/issues",
+    "issue_tracker": "https://issuetracker.google.com/issues/new?component=1673988&template=1161103",
     "language": "nodejs",
     "library_type": "GAPIC_AUTO",
     "name": "maintenance",
-    "name_pretty": "Maintenance API",
-    "product_documentation": "https://cloud.google.com/unified-maintenance/docs/overview",
+    "name_pretty": "Maintenance",
+    "product_documentation": "https://cloud.google.com/unified-maintenance/docs",
     "release_level": "preview",
-    "repo": "googleapis/google-cloud-node",
-    "requires_billing": true
+    "repo": "googleapis/google-cloud-node"
 }