refactor(plugins): 统一亲和力流模块导入路径

将 chatter 子模块重命名为 affinity_flow_chatter 后，更新相关导入路径以保持一致性：
- individuality.py 中的兴趣评分系统导入路径
- plan_filter.py 中的兴趣评分系统导入路径

这些更改确保模块引用与新的目录结构保持一致，避免导入错误。

src/plugins/built_in/affinity_flow_chatter/plan_filter.py

@@ -321,7 +321,7 @@ class ChatterPlanFilter:
         interest_scores = {}
 
         try:
-            from src.plugins.built_in.chatter.interest_scoring import chatter_interest_scoring_system as interest_scoring_system
+            from src.plugins.built_in.affinity_flow_chatter.interest_scoring import chatter_interest_scoring_system as interest_scoring_system
             from src.common.data_models.database_data_model import DatabaseMessages
 
             # 转换消息格式