chore: baseline — ORM migration + systemd deploy + MCP server + daily check

- ORM migration: models/ops 重构
- deploy: 标准化 systemd timer/service 部署体系
- MCP server: 5 个只读工具(任务/状态/数据集)
- daily check: 数据一致性巡检
- watch: task_watch 后台监控
- kline_daily: 麦蕊优先,时间门禁15:00
- 删除: task_industry_sector, task_sector_features

deploy/systemd/units/market-sync-kline-index.timer

@@ -0,0 +1,10 @@
+[Unit]
+Description=Schedule kline_index sync — Mon..Fri 15:30 Asia/Shanghai
+
+[Timer]
+OnCalendar=Mon..Fri 15:30:00 Asia/Shanghai
+Persistent=true
+Unit=market-sync-kline-index.service
+
+[Install]
+WantedBy=timers.target