- Introduced unit tests for `EmailService` covering `ConsoleEmailBackend` and `SMTPEmailBackend`.
- Added tests for password reset request and confirmation endpoints, including edge cases and error handling.
- Implemented soft delete CRUD tests to validate `deleted_at` behavior and data exclusion in queries.
- Enhanced API tests for email functionality and user management workflows.
- Introduced `CRUDBaseAsync` for reusable async operations.
- Configured async database connection using SQLAlchemy 2.0 patterns with `asyncpg`.
- Added `deleted_at` column and soft delete functionality to the `User` model, including related Alembic migration.
- Optimized queries by adding composite indexes for common user filtering scenarios.
- Extended tests: added cases for token-based security utilities and user management endpoints.
