feat: Create User Profile Schema with TypeORM and PostgreSQL

.env.example

@@ -8,3 +8,4 @@ DISCORD_WEBHOOK_URL=
 
 # Redis (required for rate limiting)
 REDIS_URL=redis://localhost:6379
+

backend/src/app.module.ts

@@ -7,13 +7,15 @@ import { StellarModule } from './stellar/stellar.module';
 import { SentryModule } from './sentry/sentry.module';
 import { RedisModule } from './common/redis/redis.module';
 import { RateLimitModule } from './common/rate-limit/rate-limit.module';
+import { UserProfileModule } from './user-profile/user-profile.module';
 
 @Module({
   imports: [
     SentryModule,
     RedisModule,
     RateLimitModule,
     AuthModule,
+    UserProfileModule,
     EscrowModule,
     WebhookModule,
     MonitoringModule,

backend/src/user-profile/index.ts

@@ -0,0 +1,5 @@
+export * from './user-profile.entity';
+export * from './user-profile.dto';
+export * from './user-profile.service';
+export * from './user-profile.controller';
+export * from './user-profile.module';