perf: 温区缓存改多周期槽——切周期(2y/5y/10y)不互踢,各周期各自缓存

server.py

@@ -41,7 +41,7 @@ def _chk_tcp(host, port, timeout=3):
 
 # ── 2026-08-15 温区数据按周期计算 + 缓存（现场温区归因约30秒/请求，缓存后毫秒级）──
 # 键 = period_tag + strategy_research 最新 created_at（数据更新即失效）
-_regime_winrates_cache = {"key": None, "pt": None, "data": None}
+_regime_winrates_cache = {"key": None, "slots": {}}  # slots: {period_tag: data}
 
 
 def _compute_regime_winrates_cached(pt, _approx_univ):
@@ -61,8 +61,8 @@ def _compute_regime_winrates_cached(pt, _approx_univ):
     except Exception:
         _cache_key = None
     if _cache_key and _regime_winrates_cache.get("key") == _cache_key \
-            and _regime_winrates_cache.get("pt") == (pt or "2y"):
-        return _regime_winrates_cache.get("data") or {}
+            and (pt or "2y") in (_regime_winrates_cache.get("slots") or {}):
+        return _regime_winrates_cache["slots"][pt or "2y"]
 
     _pt_chain = {'1m': '1y', '6m': '1y', '1y': '1y', '2y': '2y', '5y': '5y', '10y': '10y'}
     _pt_use = _pt_chain.get(pt or '2y', '2y')
@@ -169,8 +169,7 @@ def _compute_regime_winrates_cached(pt, _approx_univ):
     if _cache_key:
         try:
             _regime_winrates_cache["key"] = _cache_key
-            _regime_winrates_cache["pt"] = pt or "2y"
-            _regime_winrates_cache["data"] = _regime_winrates
+            (_regime_winrates_cache.setdefault("slots", {}))[pt or "2y"] = _regime_winrates
         except Exception:
             pass
     return _regime_winrates