feat(02-01): AuthModule with Passport strategies, guards, and decorators

- Create LocalStrategy (username/password via argon2) and JwtStrategy (cookie extractor)
- Create JwtAuthGuard with @Public() decorator support for route opt-out
- Create RolesGuard checking SUPER_ADMIN/ADMIN/USER roles per D-12
- Create AuthService with validateUser, login (30-day httpOnly cookie), logout
- Create AuthController with POST /auth/login, POST /auth/logout, GET /auth/me
- Create LoginDto with class-validator decorators
- Create @Public, @Roles, @CurrentUser decorators
- Update main.ts with ValidationPipe, CORS credentials, cookie-parser
- Install cookie-parser for httpOnly JWT cookie support

apps/api/src/auth/auth.module.ts

@@ -0,0 +1,25 @@
+import { Module } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { JwtModule } from '@nestjs/jwt';
+import { PassportModule } from '@nestjs/passport';
+import { AuthController } from './auth.controller';
+import { AuthService } from './auth.service';
+import { JwtStrategy } from './strategies/jwt.strategy';
+import { LocalStrategy } from './strategies/local.strategy';
+
+@Module({
+  imports: [
+    PassportModule,
+    JwtModule.registerAsync({
+      useFactory: (configService: ConfigService) => ({
+        secret: configService.get<string>('JWT_SECRET'),
+        signOptions: { expiresIn: '30d' },
+      }),
+      inject: [ConfigService],
+    }),
+  ],
+  controllers: [AuthController],
+  providers: [AuthService, LocalStrategy, JwtStrategy],
+  exports: [AuthService],
+})
+export class AuthModule {}