refactor(shared): improve logger injection, env validation, and PII masking

Enhance shared infrastructure services with proper dependency injection,
stricter environment variable validation, and improved PII data masking.

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

apps/api/src/modules/shared/infrastructure/env-validation.ts

@@ -15,6 +15,7 @@ const REQUIRED_IN_PRODUCTION: readonly string[] = [
   'DATABASE_URL',
   'CORS_ORIGINS',
   'REDIS_HOST',
+  'KYC_ENCRYPTION_KEY',
 ];
 
 const REQUIRED_WHEN_USED: ReadonlyMap<string, string> = new Map([