feat: 更新 .env.template 文件路径，确保模型和保存目录的正确性；在 ChromaKB 中异步添加文档以提高性能

Author: xerrors

.env.template

@@ -1,5 +1,5 @@
-MODEL_DIR=models
-SAVE_DIR=saves
+MODEL_DIR=./models
+SAVE_DIR=./saves
 
 # region model_provider
 # 推荐使用硅基流动免费服务

src/knowledge/implementations/chroma.py

@@ -1,3 +1,4 @@
+import asyncio
 import os
 import traceback
 from datetime import datetime
@@ -209,7 +210,12 @@ async def add_content(self, db_id: str, items: list[str], params: dict | None) -
                         batch_metadatas = metadatas[i : i + batch_size]
                         batch_ids = ids[i : i + batch_size]
 
-                        collection.add(documents=batch_documents, metadatas=batch_metadatas, ids=batch_ids)
+                        await asyncio.to_thread(
+                            collection.add,
+                            documents=batch_documents,
+                            metadatas=batch_metadatas,
+                            ids=batch_ids,
+                        )
 
                         batch_num = i // batch_size + 1
                         logger.info(f"Processed batch {batch_num}/{total_batches} for {filename}")