refactor: ECR-002 拆分 runtime 包并加深 analyze 契约（已审）

将 web/services/runtime.py 拆为 runtime/ 子模块并保持门面兼容；补齐 ESS 文档、门面/契约/TF_DF 测试与 CODE_REVIEW Approve。

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

tests/test_tf_df_init.py

@@ -0,0 +1,23 @@
+"""ECR-002：TF_DF 全量 __init__ 冒烟（CODE_REVIEW ECR-001 Finding 5）。"""
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT))
+
+from tests.generate_golden import make_ohlcv  # noqa: E402
+
+
+def test_tf_df_full_init_smoke():
+    from chanlun import TF_DF
+
+    df = make_ohlcv(400)
+    # interval=1：不重采样，走完整 init_TF_DF 流水线
+    tf = TF_DF(df, interval=1, timeframe="5m")
+    assert tf is not None
+    assert len(getattr(tf, "klu_list", []) or []) > 0
+    assert hasattr(tf, "bi_list")
+    assert hasattr(tf, "seg_list")
+    assert getattr(tf, "chanmacd", None) is not None