Refactor code structure for improved readability and maintainability

backend/app/services/embedding/__init__.py

@@ -1,7 +1,6 @@
-# src/services/embedding/__init__.py
 """嵌入和分块服务"""
 
 from .text_chunker import RegulationChunker
 from .bge_m3_embedder import BGEM3Embedder
 
-__all__ = ["RegulationChunker", "BGEM3Embedder"]
+__all__ = ["RegulationChunker", "BGEM3Embedder"]

backend/app/services/embedding/bge_m3_embedder.py

@@ -1,4 +1,3 @@
-# src/services/embedding/bge_m3_embedder.py
 """BGE-M3嵌入服务 - Dense+Sparse双路向量生成"""
 
 import numpy as np
@@ -293,4 +292,4 @@ def embed_single_text(
 ) -> Dict:
     """便捷函数：对单个文本生成嵌入"""
     embedder = BGEM3Embedder(model_name=model_name, **kwargs)
-    return embedder.embed_single(text)
+    return embedder.embed_single(text)

backend/app/services/embedding/text_chunker.py

@@ -1,4 +1,3 @@
-# src/services/embedding/text_chunker.py
 """智能分块器 - 章节级+条款级双粒度切割"""
 
 import re
@@ -446,4 +445,4 @@ def chunk_regulation_document(
         doc_name,
         regulation_type,
         version
-    )
+    )