refactor: 缠论引擎迁入 chan/ 分层解耦，指标外置

将核心结构、指标与分析拆到 chan/{core,indicators,analysis,pipeline}；
根目录保留兼容 shim；strategies 改为从 chan 包导入；买卖点经 bsp_macd 与 MACD 接合。

Co-authored-by: Cursor <cursoragent@cursor.com>

chan/indicators/attach.py

@@ -0,0 +1,20 @@
+"""过渡期：把 IndicatorStore 挂到 KLU 属性上，兼容旧代码读取 klu.ema52 等。"""
+
+from __future__ import annotations
+
+from typing import Iterable
+
+from .store import IndicatorStore
+
+
+def attach_indicators_for_compat(klu_list: Iterable, store: IndicatorStore) -> None:
+    """将指标写入 KLU（deprecated：新代码应通过 store.get(idx, name) 查询）。"""
+    for klu in klu_list:
+        idx = getattr(klu, "idx", None)
+        if idx is None:
+            continue
+        row = store.row(idx)
+        if row is None:
+            continue
+        if hasattr(klu, "set_indicators"):
+            klu.set_indicators(row)