NestJS Error Handling Standards

Priority: P1 (OPERATIONAL)

• Requirement: Centralize error formatting.
• Platform Agnostic: not import Request/Response from Express/Fastify types directly.
• Use: HttpAdapterHost to access underlying platform response methods.
• const { httpAdapter } = this.httpAdapterHost;
• Structure:
• Implement strictly typed error responses.
• Refer to API Standards for ApiErrorResponse.