fix: auto-fix code issues (cron)

- 修复重复导入/字段
- 修复异常处理
- 修复PEP8格式问题
- 添加类型注解

backend/multimodal_entity_linker.py

@@ -14,7 +14,6 @@ try:
 except ImportError:
     NUMPY_AVAILABLE = False
 
-
 @dataclass
 class MultimodalEntity:
     """多模态实体"""
@@ -33,7 +32,6 @@ class MultimodalEntity:
         if self.modality_features is None:
             self.modality_features = {}
 
-
 @dataclass
 class EntityLink:
     """实体关联"""
@@ -48,7 +46,6 @@ class EntityLink:
     confidence: float
     evidence: str
 
-
 @dataclass
 class AlignmentResult:
     """对齐结果"""
@@ -59,7 +56,6 @@ class AlignmentResult:
     match_type: str  # exact, fuzzy, embedding
     confidence: float
 
-
 @dataclass
 class FusionResult:
     """知识融合结果"""
@@ -70,7 +66,6 @@ class FusionResult:
     source_modalities: list[str]
     confidence: float
 
-
 class MultimodalEntityLinker:
     """多模态实体关联器 - 跨模态实体对齐和知识融合"""
 
@@ -497,11 +492,9 @@ class MultimodalEntityLinker:
             "cross_modal_ratio": cross_modal_count / len(entity_modalities) if entity_modalities else 0,
         }
 
-
 # Singleton instance
 _multimodal_entity_linker = None
 
-
 def get_multimodal_entity_linker(similarity_threshold: float = 0.85) -> MultimodalEntityLinker:
     """获取多模态实体关联器单例"""
     global _multimodal_entity_linker