Add IsAvailable property to Inbound and update related logic

- Introduced a new boolean property, `IsAvailable`, to the `Inbound` entity to track the availability status of inbounds based on synchronization results.
- Updated the `SyncNodeCommandHandler` to mark inbounds as unavailable if they are not present in the latest synchronization but have existing configurations, preventing their deletion.
- Enhanced the `MarkUnavailable` method to set both `IsAvailable` and `IsPublished` to false, reflecting the new status accurately.
- Modified the frontend components to display the availability status of inbounds, ensuring users are informed of their current state.
- Updated tests to cover the new behavior regarding inbound availability and its impact on revocation processes.

frontend/src/shared/lib/i18n.ts

@@ -316,6 +316,7 @@ const resources = {
           publish: 'Публикация',
           published: 'Опубликован',
           unpublished: 'Не опубликован',
+          unavailable: 'Недоступен на панели',
           publishSaved: 'Настройки публикации сохранены.',
           displayName: 'Отображаемое имя',
           allowedRoles: 'Доступно ролям',
@@ -757,6 +758,7 @@ const resources = {
           publish: 'Publishing',
           published: 'Published',
           unpublished: 'Not published',
+          unavailable: 'Unavailable on panel',
           publishSaved: 'Publishing settings saved.',
           displayName: 'Display name',
           allowedRoles: 'Allowed for roles',