refactor(publish): collapse pending_review/unknown task states into failed

Treat ambiguous terminal states as failures end-to-end: server
normalizes unknown desktop task completions and views to failed, drops
the pending_review aggregate branch, and remaps pending_review to
failed in publish record conversion. admin-web removes the
pending_review status option from article list filters, pushes
pending_review through the failed tone, and folds lingering
publishing/pending entries under the publishing bucket. desktop-client
relabels unknown as 发送失败 in PublishManagement/TasksView, rewrites
the scaffold adapter result to a proper failed error envelope, and
sanitises legacy scaffold-only error messages to a user-friendly note.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/desktop-client/src/renderer/views/TasksView.vue

@@ -27,7 +27,7 @@ function translateTaskStatus(status: string) {
     in_progress: "执行中",
     succeeded: "成功",
     failed: "失败",
-    unknown: "未知异常",
+    unknown: "失败",
     aborted: "已取消",
   };
   return map[status?.toLowerCase()] || status;
@@ -53,7 +53,7 @@ const columns = computed(() => {
     {
       key: "exception",
       title: "异常与终态 (Terminal)",
-      description: "unknown、failed、succeeded 等终态或补偿态。",
+      description: "failed、succeeded、aborted 等终态任务。",
       items: tasks.filter((item) => !["queued", "in_progress"].includes(item.status)),
     },
   ];