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/bff-kit/package.json

@@ -25,7 +25,7 @@
     "test": "echo \"(no tests yet)\""
   },
   "dependencies": {
-    "zod": "^3.23.0",
+    "zod": "^4.4.3",
     "@yakcloud/ds-sdk": "workspace:*",
     "@yakcloud/auth-adapter": "workspace:*"
   },