chore: 重构前基线 — 9 个 sync task 全部 ok + akshare 移除 + mairui 资金流接入

状态：
- 9 个 sync task（stock_basic / kline_daily / kline_index / kline_5min /
  moneyflow / industry_sector / sector_features / share_snapshot / market_regime）
- 数据源：baostock + mairui + 雪球(pysnowball) + 新浪（4 个）
- 项目级约束：永远不用 akshare（已落实）
- kline_5min 改用 DB 快照统一全量/增量逻辑
- 零后端 Chrome 扩展 xueqiu_sync（独立项目）

app/api/routes/schedule.py

@@ -0,0 +1,68 @@
+"""计划任务管理：列出 / 启用 / 禁用 / 改时间。"""
+from __future__ import annotations
+
+import json
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel
+
+from app.core.db import ops as db_ops
+from app.core.scheduler import (
+    get_scheduler_status,
+    is_trading_day,
+    next_trading_day,
+    seed_schedule_configs,
+)
+
+router = APIRouter(prefix="/api/schedule", tags=["schedule"])
+
+
+class ScheduleUpdate(BaseModel):
+    enabled: bool | None = None
+    time: str | None = None
+    intervalSeconds: int | None = None
+    condition: str | None = None
+
+
+@router.get("")
+def list_schedules():
+    return {"scheduler": get_scheduler_status(), "isTradingDay": is_trading_day(),
+            "nextTradingDay": next_trading_day().isoformat()}
+
+
+@router.post("/reseed")
+def reseed():
+    seed_schedule_configs()
+    return {"status": "ok"}
+
+
+@router.patch("/{key}")
+def update_schedule(key: str, body: ScheduleUpdate):
+    target = None
+    for r in db_ops.fetch_all_config():
+        if r.get("key") == key and r.get("category") == "schedule":
+            target = r
+            break
+    if target is None:
+        raise HTTPException(404, f"未知 schedule key: {key}")
+    try:
+        obj = json.loads(target.get("value", "") or "{}")
+    except (json.JSONDecodeError, TypeError):
+        obj = {}
+
+    if body.enabled is not None:
+        obj["enabled"] = body.enabled
+    if body.time is not None:
+        obj["time"] = body.time
+    if body.intervalSeconds is not None:
+        obj["intervalSeconds"] = body.intervalSeconds
+    if body.condition is not None:
+        if body.condition not in ("always", "trading_day"):
+            raise HTTPException(400, f"condition 仅支持 always / trading_day")
+        obj["condition"] = body.condition
+
+    db_ops.upsert_config(
+        key, json.dumps(obj, ensure_ascii=False),
+        category="schedule", description=target.get("description", ""),
+    )
+    return {"status": "ok", "key": key, "value": obj}