* Add OrganizationUpdateKeysCommand
* Add unit tests for OrganizationUpdateKeysCommand to validate permission checks and key updates
* Register OrganizationUpdateKeysCommand for dependency injection
* Refactor OrganizationsController to use IOrganizationUpdateKeysCommand for updating organization keys
* Remove outdated unit tests for UpdateOrganizationKeysAsync in OrganizationServiceTests
* Remove UpdateOrganizationKeysAsync method from IOrganizationService and OrganizationService implementations
* Add IOrganizationUpdateKeysCommand dependency mock to OrganizationsControllerTests
