refactor: 统一价格入口 mo_data.get_price() - 22个脚本移除自拉腾讯API

所有价格获取统一走 mo_data.get_price() / get_prices_batch():
  - 优先读 live_prices(DB) → 无/过期才调 stock_quote(API) → 自动写回DB
  - 22个脚本全部替换：branch_scanner chip_factors divergence_detector
    market_screener mo_provider mofin_collect monitor_300308 300308_monitor
    multi_timeframe refresh_macro_context stale_detector stale_push_wlin
    stock_profile strategy_evaluator strategy_lifecycle strategy_review
    strategy-staleness-check technical_analysis xiaoguo_signal_consumer
    collect_evaluation_data

scripts/sync_db_to_json.py.bak

@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+"""sync_db_to_json.py — 将DB数据同步回JSON文件（反向同步）
+
+DB是权威源，JSON文件是只读的兼容层。
+每15分钟将DB中的决策数据写到decisions.json。
+"""
+import json, sys
+from pathlib import Path
+sys.path.insert(0, str(Path(__file__).parent.parent))
+sys.path.insert(0, "/home/hmo/MoFin")
+
+DECISIONS_PATH = "/home/hmo/web-dashboard/data/decisions.json"
+
+try:
+    from mo_data import read_decisions, read_portfolio, read_watchlist
+    decisions = read_decisions()
+    portfolio = read_portfolio()
+    watchlist = read_watchlist()
+    
+    with open(DECISIONS_PATH, "w") as f:
+        json.dump(decisions, f, ensure_ascii=False, indent=2)
+    
+    cnt = len(decisions.get("decisions", []))
+    print(f"[SILENT] decisions.json updated: {cnt} entries from DB")
+except Exception as e:
+    print(f"[SILENT] sync failed: {e}")