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

@@ -137,7 +137,7 @@ class MultimodalEntityLinker:
         """
         # 名称相似度
         name_sim = self.calculate_string_similarity(
-            entity1.get("name", ""), entity2.get("name", "")
+            entity1.get("name", ""), entity2.get("name", ""),
         )
 
         # 如果名称完全匹配
@@ -158,7 +158,7 @@ class MultimodalEntityLinker:
 
         # 定义相似度
         def_sim = self.calculate_string_similarity(
-            entity1.get("definition", ""), entity2.get("definition", "")
+            entity1.get("definition", ""), entity2.get("definition", ""),
         )
 
         # 综合相似度
@@ -170,7 +170,7 @@ class MultimodalEntityLinker:
         return combined_sim, "none"
 
     def find_matching_entity(
-        self, query_entity: dict, candidate_entities: list[dict], exclude_ids: set[str] = None
+        self, query_entity: dict, candidate_entities: list[dict], exclude_ids: set[str] = None,
     ) -> AlignmentResult | None:
         """
         在候选实体中查找匹配的实体
@@ -270,7 +270,7 @@ class MultimodalEntityLinker:
         return links
 
     def fuse_entity_knowledge(
-        self, entity_id: str, linked_entities: list[dict], multimodal_mentions: list[dict]
+        self, entity_id: str, linked_entities: list[dict], multimodal_mentions: list[dict],
     ) -> FusionResult:
         """
         融合多模态实体知识
@@ -388,13 +388,13 @@ class MultimodalEntityLinker:
                                 "entities": group,
                                 "type": "homonym_conflict",
                                 "suggestion": "Consider disambiguating these entities",
-                            }
+                            },
                         )
 
         return conflicts
 
     def suggest_entity_merges(
-        self, entities: list[dict], existing_links: list[EntityLink] = None
+        self, entities: list[dict], existing_links: list[EntityLink] = None,
     ) -> list[dict]:
         """
         建议实体合并
@@ -437,7 +437,7 @@ class MultimodalEntityLinker:
                             "similarity": similarity,
                             "match_type": match_type,
                             "suggested_action": "merge" if similarity > 0.95 else "link",
-                        }
+                        },
                     )
 
         # 按相似度排序
@@ -489,7 +489,7 @@ class MultimodalEntityLinker:
         Returns:
             模态分布统计
         """
-        distribution = {mod: 0 for mod in self.MODALITIES}
+        distribution = dict.fromkeys(self.MODALITIES, 0)
 
         # 统计每个模态的实体数
         for me in multimodal_entities: