fix: PhysicalFeatureExtractor 修复 ndarray 输入时波长丢失问题

- SimpleImputer 把 DataFrame → ndarray，PhysicalFeatureExtractor.fit()
  收不到列名导致 ValueError: 必须在 __init__ 中提供 wavelengths
- get_preprocessing_transformer 新增 wavelengths 可选参数
- train_single_model 在 DualStream_MNF 时提取 X_raw 波长列表传入工厂
- PhysicalFeatureExtractor 已有 ndarray + wavelengths 参数的处理分支

src/core/modeling/modeling_batch.py

@@ -611,7 +611,11 @@ class WaterQualityModelingBatch:
             base_model.set_params(verbose=-1)
 
         # ============ 关键：把预处理器塞进 Pipeline ============
-        preproc = get_preprocessing_transformer(preprocess_method)
+        # DualStream_MNF 需要传入波长列表，供 PhysicalFeatureExtractor 定位波段
+        _wl_list = None
+        if preprocess_method == "DualStream_MNF":
+            _wl_list = self._extract_train_wavelengths(X_raw.columns)
+        preproc = get_preprocessing_transformer(preprocess_method, wavelengths=_wl_list)
         pipeline = Pipeline([
             ('imputer', SimpleImputer(strategy='median')),
             ('preproc', preproc),