chore(k8s): 下线 K8s 后端形态，移除依赖 @kubernetes/client-node

生产形态是单机 local（DEFAULT_DEPLOY_MODE=local，env 未覆盖）⇒ K8s 分支
在 local 下本来不可达；且该形态与官方 dsh 基座、插件体系均无关
=> 整体下线，并移除该形态唯一的第三方依赖。

移除（备份在 D:/github/_dsh_shenxian_K8s后端备份_20260915/，含还原命令与
「集群化方案要复用的模板清单」）：
  src/supervisor/{k8s-spawner,leader,reconcile}.ts
  src/fs/k8s-user-fs.ts · src/tcp-bridge.ts · src/web/file-service.ts
  test/{k8s-spawner,leader}.test.mjs · scripts/smoke-file-service.mjs

改写调用方：cli.ts（5 条 import / 选主块 / file-service 与 tcp-bridge 两个
子命令 / dispatch / HELP）、web/server.ts（改为 fail-loud 守卫 + 恒用
LocalSpawner）、fs/provider.ts（只留 LocalUserFs）、package.json（测试与
smoke 入口），外加 3 处指向已删类型的悬空 JSDoc。

保留（集群化方案列为未来可选）：deploy/ · poc/01-04 · Dockerfile.dsh ·
docs/k8s*.md（已加「代码已下线」状态横幅）· config.ts 的 K8s 配置字段与
DeployMode 联合类型。

验证：tsc --noEmit exit 0；npm test 36 测试 / 35 通过 / 0 失败 / 1 跳过；
npm run verify exit 0；依赖与被删符号全仓 0 命中。

package.json

@@ -22,15 +22,14 @@
     "prepare": "npm run build",
     "dev": "node lib/cli.js",
     "typecheck": "tsc -p tsconfig.json --noEmit",
-    "verify": "npm run build && node --test test/db.test.mjs test/k8s-spawner.test.mjs test/leader.test.mjs test/local-user-fs.test.mjs test/crash-policy.test.mjs && node scripts/verify-inject.cjs lib/supervisor/proxy.js && node scripts/verify-static.mjs && node scripts/verify-platform-admin-section.mjs && node scripts/verify-mem-model.mjs && node scripts/verify-model-landing.mjs && node scripts/verify-dsh-install.mjs && node scripts/verify-models-dict.mjs && node scripts/verify-models-render.cjs && node scripts/verify-dsh-compat.mjs",
-    "test": "npm run build && node --test test/db.test.mjs test/k8s-spawner.test.mjs test/leader.test.mjs test/local-user-fs.test.mjs test/crash-policy.test.mjs && node scripts/verify-inject.cjs lib/supervisor/proxy.js",
+    "verify": "npm run build && node --test test/db.test.mjs test/local-user-fs.test.mjs test/crash-policy.test.mjs && node scripts/verify-inject.cjs lib/supervisor/proxy.js && node scripts/verify-static.mjs && node scripts/verify-platform-admin-section.mjs && node scripts/verify-mem-model.mjs && node scripts/verify-model-landing.mjs && node scripts/verify-dsh-install.mjs && node scripts/verify-models-dict.mjs && node scripts/verify-models-render.cjs && node scripts/verify-dsh-compat.mjs",
+    "test": "npm run build && node --test test/db.test.mjs test/local-user-fs.test.mjs test/crash-policy.test.mjs && node scripts/verify-inject.cjs lib/supervisor/proxy.js",
     "smoke": "node scripts/smoke.mjs",
     "smoke:admin": "node scripts/smoke-admin.mjs",
     "smoke:auth": "node scripts/smoke-auth.mjs",
     "smoke:fs": "node scripts/smoke-fs.mjs",
-    "smoke:file-service": "node scripts/smoke-file-service.mjs",
     "smoke:dsh": "node scripts/smoke-dsh.mjs",
-        "smoke:domain": "node scripts/smoke-domain.mjs",
+    "smoke:domain": "node scripts/smoke-domain.mjs",
     "smoke:isolation": "node scripts/smoke-isolation.mjs",
     "smoke:subdomain": "node scripts/smoke-subdomain.mjs"
   },
@@ -65,7 +64,6 @@
   "dependencies": {
     "@fastify/rate-limit": "^10.0.0",
     "@fastify/static": "^10.1.3",
-    "@kubernetes/client-node": "^2.0.0",
     "better-sqlite3": "^11.10.0",
     "fastify": "^5.0.0",
     "pg": "^8.23.0"