feat: Provider 异步删除、可配置密码策略、Hub 超时优化及多项改进

- 新增 Provider 异步删除任务系统，后台分阶段删除子资源并清理残留引用
- 新增可配置密码策略等级（weak/medium/strong），支持系统设置面板调整
- aether-hub 升级至 0.1.4，idle timeout 支持禁用（设为 0），worker 默认超时调整为 120s
- OAuth 手动续期增加 Redis 分布式锁，防止并发刷新冲突
- ProxyNode 心跳检测改为 asyncio.to_thread，避免阻塞事件循环
- 删除 ModelMultiSelect 和 useInvalidModels，MultiSelect 组件通用化
- 明确 allowed_providers/allowed_api_formats 的 NULL 与空数组语义
- 前端 StandaloneKeyFormDialog、UserFormDialog 等多处 UI 优化
- 新增 Alembic 迁移脚本清理 Provider 删除后的残留引用
- 补充相关测试用例

frontend/src/views/admin/PoolManagement.vue

@@ -493,28 +493,13 @@
                         {{ formatOAuthPlanType(key.oauth_plan_type) }}
                       </Badge>
                       <Badge
-                        v-if="getPrimaryOAuthOrganizationTitle(key)"
-                        variant="secondary"
-                        class="text-[9px] px-1 py-0 h-4 shrink-0 max-w-[92px] truncate"
-                        :title="getOAuthOrganizationsTooltip(key)"
-                      >
-                        {{ getPrimaryOAuthOrganizationTitle(key) }}
-                      </Badge>
-                      <Badge
-                        v-if="key.oauth_account_id"
+                        v-if="getOAuthOrgBadge(key)"
                         variant="secondary"
                         class="text-[9px] px-1 py-0 h-4 shrink-0"
-                        :title="key.oauth_account_id"
+                        :title="getOAuthOrgBadge(key)?.id"
                       >
-                        acct {{ formatOAuthIdentityShort(key.oauth_account_id) }}
+                        {{ getOAuthOrgBadge(key)?.label }}
                       </Badge>
-                      <span
-                        v-if="key.oauth_account_user_id"
-                        class="text-[10px] text-muted-foreground shrink-0"
-                        :title="key.oauth_account_user_id"
-                      >
-                        AUID {{ formatOAuthIdentityShort(key.oauth_account_user_id, 10, 8) }}
-                      </span>
                     </div>
                   </div>
                 </TableCell>
@@ -818,28 +803,13 @@
                     {{ formatOAuthPlanType(key.oauth_plan_type) }}
                   </Badge>
                   <Badge
-                    v-if="getPrimaryOAuthOrganizationTitle(key)"
-                    variant="secondary"
-                    class="text-[9px] px-1 py-0 h-4 shrink-0 max-w-[92px] truncate"
-                    :title="getOAuthOrganizationsTooltip(key)"
-                  >
-                    {{ getPrimaryOAuthOrganizationTitle(key) }}
-                  </Badge>
-                  <Badge
-                    v-if="key.oauth_account_id"
+                    v-if="getOAuthOrgBadge(key)"
                     variant="secondary"
                     class="text-[9px] px-1 py-0 h-4 shrink-0"
-                    :title="key.oauth_account_id"
+                    :title="getOAuthOrgBadge(key)?.id"
                   >
-                    acct {{ formatOAuthIdentityShort(key.oauth_account_id) }}
+                    {{ getOAuthOrgBadge(key)?.label }}
                   </Badge>
-                  <span
-                    v-if="key.oauth_account_user_id"
-                    class="text-[10px] text-muted-foreground shrink-0"
-                    :title="key.oauth_account_user_id"
-                  >
-                    AUID {{ formatOAuthIdentityShort(key.oauth_account_user_id, 10, 8) }}
-                  </span>
                 </div>
               </div>
               <div class="flex items-center gap-0.5 shrink-0 flex-wrap justify-end max-w-[210px]">
@@ -1225,7 +1195,7 @@ import OAuthKeyEditDialog from '@/features/providers/components/OAuthKeyEditDial
 import OAuthAccountDialog from '@/features/providers/components/OAuthAccountDialog.vue'
 import ProxyNodeSelect from '@/features/providers/components/ProxyNodeSelect.vue'
 import { isAccountLevelBlockReason, classifyAccountBlockLabel, cleanAccountBlockReason } from '@/utils/accountBlock'
-import { formatOAuthIdentityShort, getPrimaryOAuthOrganizationTitle, getOAuthOrganizationsTooltip } from '@/utils/oauthIdentity'
+import { getOAuthOrgBadge } from '@/utils/oauthIdentity'
 
 const { success, error: showError, warning: showWarning } = useToast()
 const { confirm } = useConfirm()