feat(identity): redesign identity module and introduce RBAC foundation

- Redesign the Identity module with a richer domain model.
- Extend the User entity to support username, Authentik integration, activity tracking, and storage information.
- Add Role and Permission domain models with many-to-many relationships.
- Implement RBAC foundation using UserRole, RolePermission, and UserPermission mappings.
- Add user storage quota and usage fields with default values.
- Introduce Authentik identifiers and synchronization metadata.
- Refactor user domain logic for role and permission management.
- Update Prisma schema to support the new identity architecture.
- Improve JWT authentication and permission guard integration.
- Update repositories, handlers, controllers, mappers, DTOs, and Swagger configuration.
- Refresh environment configuration and project dependencies.

tests/api/users/get-user.spec.ts

@@ -0,0 +1,11 @@
+import test from '@playwright/test';
+import { requestGet } from '../../helpers/request';
+
+const { expect } = test;
+
+test.describe('Users - GET /users/:id', () => {
+  test('should return 404 for non-existing user', async () => {
+    const res = await requestGet('/users/non-existing-id');
+    expect([404, 400, 500]).toContain(res.status);
+  });
+});