refactor: full-stack restructure with multi-tenancy, workspace management, and K8s diagnostics

- Add Workspace domain (entity, repository, service, handler, DTO)
- Add multi-tenant K8s client with tenant binding and quota management
- Add K8s diagnostics client (instance diagnostics)
- Add authorization middleware (authz package)
- Restructure frontend to feature-based architecture (features/)
- Add User Management page in configuration
- Add AccessDenied page and route guards
- Refactor shared components (form inputs, layout, UI)
- Update Tailwind config for new design system
- Add comprehensive documentation (docs/, tasks/, plans)
- Improve cluster service with better kubeconfig handling
- Add tests for crypto, config, helm client, tenant binding

backend/config/bootstrap.example.json

@@ -2,9 +2,9 @@
   "enabled": true,
   "users": [
     {
-      "username": "admin",
-      "password": "change-me-in-production",
-      "email": "admin@example.com"
+      "username": "bootstrap-admin",
+      "password": "replace-with-a-strong-password",
+      "email": "bootstrap-admin@example.local"
     }
   ],
   "registries": [
@@ -12,8 +12,8 @@
       "name": "my-harbor",
       "url": "https://harbor.example.com",
       "description": "Harbor Registry",
-      "username": "admin",
-      "password": "change-me",
+      "username": "robot$project+ocdp",
+      "password": "replace-with-robot-token",
       "insecure": false
     }
   ],
@@ -28,4 +28,3 @@
     }
   ]
 }
-