```

chore(annotation): 添加调试日志到映射服务

- 在 _to_response_from_row 方法中添加配置和标签配置的调试日志
- 在 _to_response 方法中添加映射ID和配置信息的调试日志
- 添加响应数据键名的调试日志
- 优化配置解析逻辑以确保字典类型的正确检查
```

runtime/datamate-python/app/module/annotation/service/mapping.py

@@ -49,13 +49,21 @@ class DatasetMappingService:
         mapping = row[0]  # LabelingProject object
         dataset_name = row[1]  # dataset_name from join
 
+        logger.debug(f"_to_response_from_row: mapping.id={mapping.id}")
+
         # Get template_id from mapping
         template_id = getattr(mapping, 'template_id', None)
 
         # 从 configuration JSON 字段中提取 label_config 和 description
         configuration = getattr(mapping, 'configuration', None) or {}
-        label_config = configuration.get('label_config') if isinstance(configuration, dict) else None
-        description = configuration.get('description') if isinstance(configuration, dict) else None
+        logger.debug(f"_to_response_from_row: configuration type={type(configuration)}, value={configuration}")
+
+        label_config = None
+        description = None
+        if isinstance(configuration, dict):
+            label_config = configuration.get('label_config')
+            description = configuration.get('description')
+        logger.debug(f"_to_response_from_row: label_config={label_config[:100] if label_config else None}...")
 
         # Optionally fetch full template details
         template_response = None
@@ -94,6 +102,8 @@ class DatasetMappingService:
             mapping: LabelingProject ORM object
             include_template: If True, fetch and include full template details
         """
+        logger.debug(f"_to_response: mapping.id={mapping.id}")
+
         # Fetch dataset name
         dataset_name = None
         dataset_id = getattr(mapping, 'dataset_id', None)
@@ -108,8 +118,14 @@ class DatasetMappingService:
 
         # 从 configuration JSON 字段中提取 label_config 和 description
         configuration = getattr(mapping, 'configuration', None) or {}
-        label_config = configuration.get('label_config') if isinstance(configuration, dict) else None
-        description = configuration.get('description') if isinstance(configuration, dict) else None
+        logger.debug(f"_to_response: configuration type={type(configuration)}, value={configuration}")
+
+        label_config = None
+        description = None
+        if isinstance(configuration, dict):
+            label_config = configuration.get('label_config')
+            description = configuration.get('description')
+        logger.debug(f"_to_response: label_config={label_config[:100] if label_config else None}...")
 
         # Optionally fetch full template details
         template_response = None
@@ -135,6 +151,7 @@ class DatasetMappingService:
             "deleted_at": mapping.deleted_at,
         }
 
+        logger.debug(f"_to_response: response_data keys={response_data.keys()}")
         return DatasetMappingResponse(**response_data)
     
     async def create_mapping(