重构KGManager类，移除对local_storage的依赖，简化KG目录路径获取逻辑

src/chat/knowledge/kg_manager.py

@@ -21,7 +21,6 @@ from quick_algo import di_graph, pagerank
 from .utils.hash import get_sha256
 from .embedding_store import EmbeddingManager, EmbeddingStoreItem
 from .lpmmconfig import global_config
-from src.manager.local_store_manager import local_storage
 
 from .global_logger import logger
 
@@ -30,19 +29,9 @@ def _get_kg_dir():
     """
     安全地获取KG数据目录路径
     """
-    root_path: str = local_storage["root_path"]
-    if root_path is None:
-        # 如果 local_storage 中没有 root_path，使用当前文件的相对路径作为备用
-        current_dir = os.path.dirname(os.path.abspath(__file__))
-        root_path = os.path.abspath(os.path.join(current_dir, "..", "..", ".."))
-        logger.warning(f"local_storage 中未找到 root_path，使用备用路径: {root_path}")
-
-    # 获取RAG数据目录
-    rag_data_dir: str = global_config["persistence"]["rag_data_dir"]
-    if rag_data_dir is None:
-        kg_dir = os.path.join(root_path, "data/rag")
-    else:
-        kg_dir = os.path.join(root_path, rag_data_dir)
+    current_dir = os.path.dirname(os.path.abspath(__file__))
+    root_path: str = os.path.abspath(os.path.join(current_dir, "..", "..", ".."))
+    kg_dir = os.path.join(root_path, "data/rag")
 
     return str(kg_dir).replace("\\", "/")
 
@@ -65,9 +54,9 @@ class KGManager:
 
         # 持久化相关 - 使用延迟初始化的路径
         self.dir_path = get_kg_dir_str()
-        self.graph_data_path = self.dir_path + "/" + local_storage["rag_graph_namespace"] + ".graphml"
-        self.ent_cnt_data_path = self.dir_path + "/" + local_storage["rag_ent_cnt_namespace"] + ".parquet"
-        self.pg_hash_file_path = self.dir_path + "/" + local_storage["rag_pg_hash_namespace"] + ".json"
+        self.graph_data_path = self.dir_path + "/" + "rag-graph" + ".graphml"
+        self.ent_cnt_data_path = self.dir_path + "/" + "rag-ent-cnt" + ".parquet"
+        self.pg_hash_file_path = self.dir_path + "/" + "rag-pg-hash" + ".json"
 
     def save_to_file(self):
         """将KG数据保存到文件"""
@@ -122,8 +111,8 @@ class KGManager:
                     # 避免自连接
                     continue
                 # 一个triple就是一条边（同时构建双向联系）
-                hash_key1 = local_storage["ent_namespace"] + "-" + get_sha256(triple[0])
-                hash_key2 = local_storage["ent_namespace"] + "-" + get_sha256(triple[2])
+                hash_key1 = "entity" + "-" + get_sha256(triple[0])
+                hash_key2 = "entity" + "-" + get_sha256(triple[2])
                 node_to_node[(hash_key1, hash_key2)] = node_to_node.get((hash_key1, hash_key2), 0) + 1.0
                 node_to_node[(hash_key2, hash_key1)] = node_to_node.get((hash_key2, hash_key1), 0) + 1.0
                 entity_set.add(hash_key1)
@@ -141,8 +130,8 @@ class KGManager:
         """构建实体节点与文段节点之间的关系"""
         for idx in triple_list_data:
             for triple in triple_list_data[idx]:
-                ent_hash_key = local_storage["ent_namespace"] + "-" + get_sha256(triple[0])
-                pg_hash_key = local_storage["pg_namespace"] + "-" + str(idx)
+                ent_hash_key = "entity" + "-" + get_sha256(triple[0])
+                pg_hash_key = "paragraph" + "-" + str(idx)
                 node_to_node[(ent_hash_key, pg_hash_key)] = node_to_node.get((ent_hash_key, pg_hash_key), 0) + 1.0
 
     @staticmethod
@@ -157,8 +146,8 @@ class KGManager:
         ent_hash_list = set()
         for triple_list in triple_list_data.values():
             for triple in triple_list:
-                ent_hash_list.add(local_storage["ent_namespace"] + "-" + get_sha256(triple[0]))
-                ent_hash_list.add(local_storage["ent_namespace"] + "-" + get_sha256(triple[2]))
+                ent_hash_list.add("entity" + "-" + get_sha256(triple[0]))
+                ent_hash_list.add("entity" + "-" + get_sha256(triple[2]))
         ent_hash_list = list(ent_hash_list)
 
         synonym_hash_set = set()
@@ -263,7 +252,7 @@ class KGManager:
         for src_tgt in node_to_node.keys():
             for node_hash in src_tgt:
                 if node_hash not in existed_nodes:
-                    if node_hash.startswith(local_storage["ent_namespace"]):
+                    if node_hash.startswith("entity"):
                         # 新增实体节点
                         node = embedding_manager.entities_embedding_store.store.get(node_hash)
                         if node is None:
@@ -275,7 +264,7 @@ class KGManager:
                         node_item["type"] = "ent"
                         node_item["create_time"] = now_time
                         self.graph.update_node(node_item)
-                    elif node_hash.startswith(local_storage["pg_namespace"]):
+                    elif node_hash.startswith("paragraph"):
                         # 新增文段节点
                         node = embedding_manager.paragraphs_embedding_store.store.get(node_hash)
                         if node is None:
@@ -359,7 +348,7 @@ class KGManager:
             # 关系三元组
             triple = relation[2:-2].split("', '")
             for ent in [(triple[0]), (triple[2])]:
-                ent_hash = local_storage["ent_namespace"] + "-" + get_sha256(ent)
+                ent_hash = "entity" + "-" + get_sha256(ent)
                 if ent_hash in existed_nodes:  # 该实体需在KG中存在
                     if ent_hash not in ent_sim_scores:  # 尚未记录的实体
                         ent_sim_scores[ent_hash] = []
@@ -439,7 +428,7 @@ class KGManager:
         passage_node_res = [
             (node_key, score)
             for node_key, score in ppr_res.items()
-            if node_key.startswith(local_storage["pg_namespace"])
+            if node_key.startswith("paragraph")
         ]
         del ppr_res