migrate: remove final JSON cold backup lines, prune/branch→DB

strategy_lifecycle.py

@@ -2540,19 +2540,6 @@ def regenerate_all(stdout=True):
         conn.close()
     except Exception as e:
         print(f"  [DB写入失败] {e}", flush=True)
-    # JSON 冷备
-    json.dump(existing_pf, open(PORTFOLIO_PATH, "w"), ensure_ascii=False, indent=2)
-    json.dump(wl, open(WATCHLIST_PATH, "w"), ensure_ascii=False, indent=2)
-
-    # 写 decisions.json
-    decisions_path = "/home/hmo/web-dashboard/data/decisions.json"
-    decisions_data = {
-        "decisions": decisions,  # 全部保留
-        "total": len(decisions),
-        "regenerated_at": datetime.now().strftime('%Y-%m-%d %H:%M'),
-    }
-    json.dump(decisions_data, open(decisions_path, "w"), ensure_ascii=False, indent=2)
-    # DB 已在上方写入（和 portfolio/watchlist 一起）
 
     # 记录策略→提示词版本关联
     if HAS_PROMPT_TRACKING: