refactor: 统一类型注解风格并优化代码结构

- 将裸 except 改为显式 Exception 捕获
- 用列表推导式替换冗余 for 循环
- 为类属性添加 ClassVar 注解
- 统一 Union/Optional 写法为 |
- 移除未使用的导入
- 修复 SQLAlchemy 空值比较语法
- 优化字符串拼接与字典更新逻辑
- 补充缺失的 noqa 注释与异常链

BREAKING CHANGE: 所有插件基类的类级字段现要求显式 ClassVar 注解，自定义插件需同步更新

src/person_info/person_info.py

@@ -181,15 +181,11 @@ class PersonInfoManager:
         final_data = {"person_id": person_id}
 
         # Start with defaults for all model fields
-        for key, default_value in _person_info_default.items():
-            if key in model_fields:
-                final_data[key] = default_value
+        final_data.update({key: default_value for key, default_value in _person_info_default.items() if key in model_fields})
 
         # Override with provided data
         if data:
-            for key, value in data.items():
-                if key in model_fields:
-                    final_data[key] = value
+            final_data.update({key: value for key, value in data.items() if key in model_fields})
 
         # Ensure person_id is correctly set from the argument
         final_data["person_id"] = person_id
@@ -242,15 +238,11 @@ class PersonInfoManager:
         final_data = {"person_id": person_id}
 
         # Start with defaults for all model fields
-        for key, default_value in _person_info_default.items():
-            if key in model_fields:
-                final_data[key] = default_value
+        final_data.update({key: default_value for key, default_value in _person_info_default.items() if key in model_fields})
 
         # Override with provided data
         if data:
-            for key, value in data.items():
-                if key in model_fields:
-                    final_data[key] = value
+            final_data.update({key: value for key, value in data.items() if key in model_fields})
 
         # Ensure person_id is correctly set from the argument
         final_data["person_id"] = person_id

src/person_info/relationship_builder.py

@@ -403,7 +403,7 @@ class RelationshipBuilder:
             # 异步执行关系构建
             import asyncio
 
-            asyncio.create_task(self.update_impression_on_segments(person_id, self.chat_id, segments))
+            asyncio.create_task(self.update_impression_on_segments(person_id, self.chat_id, segments))  # noqa: RUF006
             # 移除已处理的用户缓存
             del self.person_engaged_cache[person_id]
             self._save_cache()

src/person_info/relationship_fetcher.py

@@ -235,10 +235,10 @@ class RelationshipFetcher:
 
     async def build_chat_stream_impression(self, stream_id: str) -> str:
         """构建聊天流的印象信息
-        
+
         Args:
             stream_id: 聊天流ID
-            
+
         Returns:
             str: 格式化后的聊天流印象字符串
         """