feat(kb): VikingDB纯检索+重排+Redis上下文+全库搜索+别名扩展+KB保护窗口+RAG语气引导

- 新增 kbRetriever.js: VikingDB search_knowledge 纯检索替代 Ark chat/completions, doubao-seed-rerank 重排, RAG payload 语气引导缓解音色差异

- 新增 redisClient.js: Redis 连接管理 + 5轮对话历史 + KB缓存双写

- toolExecutor.js: 产品别名扩展25条, 全库检索topK=25, 检索阈值0.01, 精简 buildDeterministicKnowledgeQuery

- nativeVoiceGateway.js: isPureChitchat扩展, KB保护窗口60s, prequery参数调优

- realtimeDialogRouting.js: resolveReply感知KB保护窗口, fast-path适配raw模式

- app.js: 健康检查新增 redis/reranker/kbRetrievalMode

- 新增测试: alias A/B测试, KB retriever测试, Redis客户端测试, raw模式集成测试

test2/server/tests/_check_logs.cjs

@@ -0,0 +1,92 @@
+const { Client } = require('ssh2');
+const SSH_CONFIG = { host: '119.45.10.34', port: 22, username: 'root', password: '#xyzh%CS#2512@28' };
+
+function sshExec(conn, cmd) {
+  return new Promise((resolve, reject) => {
+    conn.exec(cmd, (err, s) => {
+      if (err) return reject(err);
+      let o = '';
+      s.on('data', d => o += d);
+      s.stderr.on('data', d => o += d);
+      s.on('close', () => resolve(o));
+    });
+  });
+}
+
+const fs = require('fs');
+const path = require('path');
+
+function sftpUpload(conn, localPath, remotePath) {
+  return new Promise((resolve, reject) => {
+    conn.sftp((err, sftp) => {
+      if (err) return reject(err);
+      const rs = fs.createReadStream(localPath);
+      const ws = sftp.createWriteStream(remotePath);
+      ws.on('close', () => resolve());
+      ws.on('error', reject);
+      rs.pipe(ws);
+    });
+  });
+}
+
+const REMOTE_BASE = '/www/wwwroot/demo.tensorgrove.com.cn/server';
+const LOCAL_BASE = path.join(__dirname, '..');
+
+async function main() {
+  const conn = new Client();
+  await new Promise((resolve, reject) => {
+    conn.on('ready', resolve).on('error', reject).connect(SSH_CONFIG);
+  });
+
+  // 1. 上传文件
+  const files = [
+    { name: 'toolExecutor.js', sub: 'services' },
+    { name: 'kbRetriever.js', sub: 'services' },
+  ];
+  console.log('=== 上传 ===');
+  for (const f of files) {
+    const localFile = path.join(LOCAL_BASE, f.sub, f.name);
+    const remoteFile = `${REMOTE_BASE}/${f.sub}/${f.name}`;
+    await sftpUpload(conn, localFile, remoteFile);
+    console.log(`  \u2705 ${f.name}`);
+    const sc = await sshExec(conn, `node -c ${remoteFile} 2>&1`);
+    if (sc.includes('SyntaxError')) { console.log('SYNTAX ERROR!'); conn.end(); process.exit(1); }
+  }
+
+  // 2. 刷 Redis KB 缓存
+  console.log('\n=== 刷 Redis KB 缓存 ===');
+  console.log(await sshExec(conn, `cd ${REMOTE_BASE} && node -e "
+    require('dotenv').config();
+    const Redis = require('ioredis');
+    const r = new Redis(process.env.REDIS_URL || 'redis://127.0.0.1:6379', {
+      password: process.env.REDIS_PASSWORD || undefined,
+      db: parseInt(process.env.REDIS_DB) || 0,
+      keyPrefix: process.env.REDIS_KEY_PREFIX || 'bigwo:',
+      lazyConnect: true, maxRetriesPerRequest: 2, connectTimeout: 5000,
+    });
+    r.connect().then(async () => {
+      const keys = await r.keys('kb_cache:*');
+      if (keys.length > 0) { await r.del(...keys); console.log('Deleted ' + keys.length + ' keys'); }
+      else { console.log('No keys'); }
+      r.quit(); process.exit(0);
+    }).catch(e => { console.log('Redis: ' + e.message); process.exit(0); });
+  " 2>&1`));
+
+  // 3. 重启
+  await sshExec(conn, '> /var/log/bigwo/server-error.log && > /var/log/bigwo/server-out.log');
+  await sshExec(conn, 'pm2 stop bigwo-server');
+  await new Promise(r => setTimeout(r, 1000));
+  await sshExec(conn, `cd ${REMOTE_BASE} && pm2 start bigwo-server --update-env`);
+  console.log('\n=== PM2 重启，等待5s ===');
+  await new Promise(r => setTimeout(r, 5000));
+  console.log(await sshExec(conn, 'pm2 status bigwo-server'));
+  const errLog = await sshExec(conn, 'cat /var/log/bigwo/server-error.log');
+  console.log('=== 错误 ===');
+  console.log(errLog || '(空 ✅)');
+  console.log('\n=== 健康 ===');
+  console.log(await sshExec(conn, 'curl -s --max-time 5 http://localhost:3012/api/health 2>&1'));
+
+  conn.end();
+}
+
+main().catch(e => { console.error('FAILED:', e.message); process.exit(1); });