feat(ds-sdk): B3 추출 — DTO·Zod·bind-env 9종·ApiCode (리프)

yakconsole → @yakcloud/ds-sdk 추출(11 모듈):
- enums.ts: 상태/타입 리터럴 유니온 SSOT(값 배열 + type)
- dto/: cluster·service·deployment·account·domain (비밀필드 제외, publicService 계약 동형)
- bind-env.ts: BIND_ENV_VARS 9종(MONGODB..ORACLE) + SERVICE_DEFAULT_PORT + bindEnvPrefix/bindEnvKeys
- schemas.ts: zod(생성/검증 body + DTO), api-codes.ts: ApiCode 유니온 + CODE_STATUS
- zod ^4.4.3(소스 정합), 리프 규칙 준수(react/prisma/next/서버 import 0)

검증: 적대적 Verify=SHIP, bind-env 9종 Python _bind_env_for parity 완전 일치,
누출 0, tsc --noEmit 통과(strict+noUncheckedIndexedAccess+verbatimModuleSyntax).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/ds-sdk/src/dto/index.ts

@@ -0,0 +1,18 @@
+// dto/* 배럴 재수출.
+export type { ClusterDTO, ClusterEventDTO, ClusterDetailDTO, TemplateDTO } from "./cluster";
+export type { ServiceDTO, BindingDTO } from "./service";
+export type { EnvVarDTO, DeploymentDTO } from "./deployment";
+export type {
+  UserDTO,
+  QuotaDTO,
+  MeDTO,
+  QuotaRequestDTO,
+  QuotaRequestAdminDTO,
+  PlanRequestAdminDTO,
+  UsageClusterDTO,
+  UsageHistoryPoint,
+  UsageSummaryDTO,
+  NodeMetricDTO,
+  ClusterUsageDTO,
+} from "./account";
+export type { DomainDTO } from "./domain";