feat(auth): implement Auth module with register, login, JWT, guards, and CQRS

- Add RefreshToken and OAuthAccount models to Prisma schema
- Implement clean architecture: domain (entities, VOs, events, repo interfaces),
  infrastructure (Prisma repos, Passport strategies, token service),
  application (CQRS command/query handlers), presentation (controller, guards, DTOs)
- Endpoints: POST /auth/register, /auth/login, /auth/refresh, GET /auth/profile,
  GET /auth/profile/agent, PATCH /auth/kyc
- JWT access + refresh token rotation with family-based revocation
- Role-based guards (BUYER, SELLER, AGENT, ADMIN)
- 16 unit tests (value objects, entity) + integration test suite
- All 80 tests passing, clean TypeScript build

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/auth/presentation/dto/register.dto.ts

@@ -0,0 +1,18 @@
+import { IsString, IsOptional, IsEmail, MinLength } from 'class-validator';
+
+export class RegisterDto {
+  @IsString()
+  phone!: string;
+
+  @IsString()
+  @MinLength(8)
+  password!: string;
+
+  @IsString()
+  @MinLength(1)
+  fullName!: string;
+
+  @IsOptional()
+  @IsEmail()
+  email?: string;
+}