Module auth 

Authentication and Role-Based Access Control (RBAC) for AstraeaDB.

Supports API key authentication with three roles:

• Admin: full access to all operations
• Writer: read + write operations (no admin)
• Reader: read-only operations

Structs

ApiKeyEntry

An API key entry with associated metadata.

AuditEntry

An entry in the audit log.

AuthManager

Authentication and authorization manager.

Enums

Role

User roles with increasing privilege levels.