fix: 推理/评测结果同步、数据集统计与算力节点管理增强

后端:
- 抽取 fetch_eval_result_content 复用函数，model_eval_detail 直接应用评测任务结果
- health 接口移除数据库依赖，返回静态指标
- 数据集: count_dataset_records JSON 感知计数; 文件统计改为从 dataset_files 聚合重算; 在线编辑记录 size/record_count/version_no; 上传同步批处理
- 算力节点: 调度支持 requested GPU 子集校验与容量计算; 新增 delete_compute_node(含活动任务保护)及 DELETE 接口; 连接池 connect_timeout
- 评测任务落库 basic_metrics/score/completed_time, failed/stopped 记录 error

评测引擎:
- _load_dataset 支持 JSON/JSONL 文件
- 新增 exact match 与文本相似度指标, 余弦相似度去掉 2 样本限制

前端:
- 算力节点列表「维护」改为「删除」(带确认弹窗), compute.ts 新增 deleteComputeNode
- 数据集上传超时调整为 120s; FineTuneTask 增加 compute_node_id; GpuInfo 状态增加 reserved

frontend/src/views/compute/ComputeNodesView.vue

@@ -1,12 +1,12 @@
 <script setup lang="ts">
 import { computed, onMounted, onUnmounted, reactive, ref, watch } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
-import { ElMessage } from 'element-plus'
+import { ElMessage, ElMessageBox } from 'element-plus'
 import {
   checkNodeReplicaDrift,
   createComputeNode,
+  deleteComputeNode,
   disableComputeNode,
-  drainComputeNode,
   enableComputeNode,
   getComputeGpus,
   getComputeNodes,
@@ -129,11 +129,10 @@ async function changeTab(name: string | number) {
   await router.replace({ path: '/compute', query: { tab: String(name) } })
 }
 
-async function handleNodeAction(action: 'enable' | 'disable' | 'drain' | 'test', node: ComputeNode) {
+async function handleNodeAction(action: 'enable' | 'disable' | 'test', node: ComputeNode) {
   const nodeId = String(node.id)
   if (action === 'enable') await enableComputeNode(nodeId)
   if (action === 'disable') await disableComputeNode(nodeId)
-  if (action === 'drain') await drainComputeNode(nodeId)
   if (action === 'test') {
     const result = await testComputeNode(nodeId)
     if (result.success) {
@@ -145,6 +144,27 @@ async function handleNodeAction(action: 'enable' | 'disable' | 'drain' | 'test',
   await load()
 }
 
+async function handleDeleteNode(node: ComputeNode) {
+  try {
+    await ElMessageBox.confirm(
+      `确定删除算力节点「${node.name || node.code}」吗？节点删除后，其 GPU 设备和资源副本记录也会一并移除。`,
+      '删除算力节点',
+      { type: 'warning', confirmButtonText: '删除', cancelButtonText: '取消' },
+    )
+  } catch {
+    return
+  }
+  try {
+    await deleteComputeNode(String(node.id))
+    ElMessage.success('算力节点已删除')
+    if (selectedNodeId.value === node.id) selectedNodeId.value = ''
+    await load({ showButtonLoading: true })
+  } catch (err: any) {
+    const message = err?.response?.data?.detail?.message || err?.response?.data?.message || '删除算力节点失败'
+    ElMessage.error(message)
+  }
+}
+
 async function handleReplicaDriftCheck() {
   if (!selectedNodeId.value) return
   checkingReplicas.value = true
@@ -355,7 +375,7 @@ onUnmounted(() => {
               <el-button size="small" @click="handleNodeAction('test', asComputeNode(row))">测试</el-button>
               <el-button v-if="row.enabled" size="small" @click="handleNodeAction('disable', asComputeNode(row))">停用</el-button>
               <el-button v-else size="small" type="primary" @click="handleNodeAction('enable', asComputeNode(row))">启用</el-button>
-              <el-button size="small" type="warning" plain @click="handleNodeAction('drain', asComputeNode(row))">维护</el-button>
+              <el-button size="small" type="danger" plain @click="handleDeleteNode(asComputeNode(row))">删除</el-button>
             </template>
           </el-table-column>
         </el-table>