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/unit/user.service.spec.ts

@@ -0,0 +1,41 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { UserService } from '../../src/modules/identity/application/services/user.service';
+import { PrismaService } from '../../src/shared/prisma.service';
+import { IUser } from '../../src/modules/identity/domain/repositories/user.interface';
+
+describe('UserService', () => {
+  let service: UserService;
+  let prisma: Partial<PrismaService>;
+  let userRepo: Partial<IUser>;
+
+  beforeEach(async () => {
+    prisma = {
+      user: {
+        update: jest.fn().mockResolvedValue(null),
+        findMany: jest.fn().mockResolvedValue([]),
+      },
+    } as any;
+
+    userRepo = {
+      create: jest.fn().mockImplementation(async (user) => {
+        return { ...user, id: 'user-1' };
+      }),
+      getById: jest.fn().mockResolvedValue({ id: 'user-1', username: 'u', email: 'e' }),
+      existByEmail: jest.fn().mockResolvedValue(false),
+    } as any;
+
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        UserService,
+        { provide: PrismaService, useValue: prisma },
+        { provide: IUser, useValue: userRepo },
+      ],
+    }).compile();
+
+    service = module.get<UserService>(UserService);
+  });
+
+  it('createUser - provisioning disabled', async () => {
+    await expect(service.createUser({ username: 'u', email: 'e' })).rejects.toThrow();
+  });
+});