docs: 更新文档路径引用，移除硬编码密钥，修复 Docker 配置

rag_indexer/clear_qdrant.py

@@ -13,9 +13,20 @@ import argparse
 from dotenv import load_dotenv
 load_dotenv()
 
-QDRANT_URL = os.getenv("QDRANT_URL", "http://127.0.0.1:6333")
+QDRANT_URL = os.getenv("QDRANT_URL")
 QDRANT_API_KEY = os.getenv("QDRANT_API_KEY")
-DB_URI = os.getenv("DB_URI", "postgresql://postgres:huang1998@115.190.121.151:5432/langgraph_db?sslmode=disable")
+
+# PostgreSQL 配置（使用分离配置，优先于 DB_URI）
+DB_HOST = os.getenv("DB_HOST")
+DB_PORT = os.getenv("DB_PORT", "5432")
+DB_USER = os.getenv("DB_USER")
+DB_PASSWORD = os.getenv("DB_PASSWORD")
+DB_NAME = os.getenv("DB_NAME")
+
+# 构建 DB_URI（如果没有直接配置）
+DB_URI = os.getenv("DB_URI")
+if not DB_URI and all([DB_HOST, DB_PORT, DB_USER, DB_PASSWORD, DB_NAME]):
+    DB_URI = f"postgresql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/{DB_NAME}?sslmode=disable"
 COLLECTION_NAME = "rag_documents"
 TABLE_NAME = "parent_documents"