fix(fs): S-10 hang test hook requires UMT_FS_TEST_HOOKS=1; preflight warns when set

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/server/src/main.ts

@@ -127,6 +127,12 @@ async function runOneShot(r: OneShotRole): Promise<number> {
         logger.warn({ kind: w.kind, id: w.id, path: w.path }, `挂载路径不可用: ${w.name} ${w.reason}`);
       }
       await auditStorageWarnings(db, storage.warnings).catch((err) => logger.warn({ err }, "存储告警写审计失败"));
+      // 验收开关误设提示(验收 07 S-10):只有 UMT_FS_TEST_HOOKS=1 时才真正生效
+      if (Deno.env.get("UMT_FS_TEST_HANG_AFTER_BYTES"))
+        logger.warn(
+          { active: Deno.env.get("UMT_FS_TEST_HOOKS") === "1" },
+          "设置了 UMT_FS_TEST_HANG_AFTER_BYTES(fsproxy 挂死验收开关);生产环境不要设置,生效时所有数据类文件操作都会卡死到被 SIGKILL",
+        );
       for (const p of problems) logger.error({ check: p.check }, p.message);
       if (problems.length) return 1;
       logger.info(