refactor: 移除硬编码配置，使用环境变量管理API密钥和路径

重构XinferenceEmbeddings和XinferenceReRankerModel类，移除硬编码的API密钥和路径
统一使用环境变量管理配置，提高安全性和灵活性
修改数据库路径为相对路径，增强可移植性

rag2_0/tool/ModelTool.py

@@ -23,13 +23,13 @@ from urllib.parse import urljoin
 
 class XinferenceEmbeddings(Embeddings):
     """SiliconFlow嵌入模型封装"""
-    def __init__(self, api_key: str, model: str = os.getenv("EMBEDDING_MODEL_NAME", "bge-m3")):
-        self.api_key = api_key
+    def __init__(self, model: str = os.getenv("EMBEDDING_MODEL_NAME", "bge-m3")):
         self.model = model
-        base_url = os.getenv("XINFERENCE_URL", "http://10.1.16.39:9995")
+        base_url = os.getenv("EMBEDDING_BASE_URL", "http://10.1.16.39:9995")
         self.url = urljoin(base_url.rstrip('/') + '/', 'v1/embeddings')
+        api_key = os.getenv("EMBEDDING_API_KEY", "")
         self.headers = {
-            "Authorization": f"Bearer {self.api_key}",
+            "Authorization": f"Bearer {api_key}",
             "Content-Type": "application/json"
         }
 
@@ -89,12 +89,13 @@ class XinferenceReRankerModel:
             List[dict]: 重排序后的文档列表，每个元素包含document内容、相关性分数和原始索引
         """
         
-        base_url = os.getenv("XINFERENCE_URL", "http://10.1.16.39:9995")
+        base_url = os.getenv("RERANKER_BASE_URL", "http://10.1.16.39:9995")
         model_name = os.getenv("RERANKER_MODEL_NAME", "bge-reranker-v2-m3")
+        api_key = os.getenv("RERANKER_API_KEY", "")
         rerank_url = urljoin(base_url.rstrip('/') + '/', 'v1/rerank')
         params = {"documents": documents, "query": query, "top_n": top_k, "return_documents": True, "model": model_name}
         headers = {
-            "Authorization": "Bearer <token>",  # 这里需要替换为实际的token
+            "Authorization": f"Bearer {api_key}",  # 这里需要替换为实际的token
             "Content-Type": "application/json"
         }
         
@@ -123,12 +124,14 @@ class XinferenceReRankerModel:
         Returns:
             List[dict]: 重排序后的文档列表，每个元素包含document内容、相关性分数和原始索引
         """
-        base_url = os.getenv("XINFERENCE_URL", "http://10.1.16.39:9995")
+        base_url = os.getenv("RERANKER_BASE_URL", "http://10.1.16.39:9995")
         rerank_url = urljoin(base_url.rstrip('/') + '/', 'v1/rerank')
         model_name = os.getenv("RERANKER_MODEL_NAME", "bge-reranker-v2-m3")
+        api_key = os.getenv("RERANKER_API_KEY", "")
+
         params = {"documents": documents, "query": query, "top_n": top_k, "return_documents": True, "model": model_name}
         headers = {
-            "Authorization": "Bearer <token>",  # 这里需要替换为实际的token
+            "Authorization": f"Bearer {api_key}",  # 这里需要替换为实际的token
             "Content-Type": "application/json"
         }
         
@@ -214,7 +217,9 @@ class OpenAiLLM:
                     messages=[{'role': 'user', 'content': user_prompt}],
                     **kwargs
                 )
-                return completion.choices[0].message
+                message = completion.choices[0].message
+                message.usage = completion.usage
+                return message
         except Exception as e:
             raise RuntimeError(f"OpenAiLLM:ainvoke:error:{str(e)}") from e