fix(infra): PostgreSQL → MySQL + tsconfig.build exclude frontend/

src/app.module.ts

@@ -22,7 +22,7 @@ import { HealthController } from './common/health.controller';
       imports: [ConfigModule],
       inject: [ConfigService],
       useFactory: (config: ConfigService) => ({
-        type: 'postgres',
+        type: 'mysql',
         url: config.get<string>('DATABASE_URL'),
         autoLoadEntities: true,
         synchronize: config.get('NODE_ENV') !== 'production',

src/database/data-source.ts

@@ -6,9 +6,9 @@ import { LevelThreshold } from '../character/entities/level-threshold.entity';
 
 // DataSource pour le CLI TypeORM (migrations manuelles)
 export const AppDataSource = new DataSource({
-  type: 'postgres',
-  url: process.env.DATABASE_URL ?? 'postgresql://tetardpg:password@localhost:5432/tetardpg',
+  type: 'mysql',
+  url: process.env.DATABASE_URL ?? 'mysql://tetardpg:password@172.17.0.1:3306/tetardpg',
   entities: [User, Character, LevelThreshold],
-  migrations: ['src/database/migrations/*.ts'],
+  migrations: ['src/migrations/*.ts'],
   synchronize: false,
 });