Added comprehensive unit tests for `TagsService` and `TagsController`, covering CRUD operations, exception handling, and associations with projects and persons. Mocked `JwtAuthGuard` globally for testing purposes.
Added unit tests for `GroupsService`, `GroupsController`, `AuthService`, `AuthController`, and `JwtAuthGuard` to ensure functionality and coverage. Includes tests for entity operations, exception handling, and integration scenarios.
Introduced `JwtAuthGuard` as a global authentication mechanism using `APP_GUARD`. Added support for public routes via a `Public` decorator with metadata. Updated `AuthController`
Added new authentication strategies (JWT and GitHub OAuth), guards, and controllers. Implemented database module, schema with relations, and group management features, including CRD operations and person-to-group associations. Integrated validation and CORS configuration.