🔑 Improve DLE authentication and authorization (SSO, LDAP, etc.)

[anatolystansler]

Hi! We are working on improving access control for the Database Lab Engine.

The primary focus is LDAP, Active Directory, SSO support for clones and UI/CLI connections, granular control over user permissions.

See more details and comments on GitLab issue #315.

Your contributions are very welcome to support our open-source product: provide ideas, technical details, develop new features.