data_snapshot统一数据入口+DB银行locked修复+建滔/现金修正

data_snapshot.py: 所有报告脚本的唯一数据入口(通过mo_data读DB)
price_monitor.py: DB写入加了3次重试+PRAGMA busy_timeout=5000
quality gate: 新增GATE_PROFIT_EXISTS(止盈=0拦截)+GATE_9D_ANALYSIS
建滔(01888) DB已修正: price=84.9 HKD, cost=88.23 HKD, 浮亏-3.8%
现金已修正: 132,121.93 (frozen=0)

price_monitor.py

@@ -266,13 +266,21 @@ def refresh_data_prices():
         pf['total_assets'] = calc_total_assets(pf)
         pf['position_pct'] = calc_position_pct(pf)
         # DB 写入（替代 json.dump，强制币种约束）
-        try:
-            conn = get_conn()
-            write_holdings_batch(conn, pf['holdings'])
-            write_portfolio_summary(conn, pf)
-            conn.close()
-        except Exception as e:
-            print(f"  [DB写入失败] {e}", flush=True)
+        for attempt in range(3):
+            try:
+                conn = get_conn()
+                conn.execute("PRAGMA busy_timeout=5000")  # 等待5秒而非立即放弃
+                write_holdings_batch(conn, pf['holdings'])
+                write_portfolio_summary(conn, pf)
+                conn.close()
+                if attempt > 0:
+                    print(f"  [DB写入 OK after {attempt+1} retries]", flush=True)
+                break
+            except Exception as e:
+                if attempt < 2:
+                    import time; time.sleep((attempt+1)*1)
+                else:
+                    print(f"  [DB写入失败 3次重试后放弃] {e}", flush=True)
         # 保留 JSON 副本作为冷备
         json.dump(pf, open(PORTFOLIO_PATH, 'w'), ensure_ascii=False, indent=2)
     elif pf.get('updated_at'):