refactor(database): 重构数据库存储实现，使用SQLAlchemy ORM替代原始SQL操作

- 删除旧的async_db.py和async_sqlite_db.py实现
- 新增SQLAlchemy ORM模型和数据库会话管理
- 统一各平台存储实现到_store_impl.py文件
- 添加数据库初始化功能支持
- 更新.gitignore和pyproject.toml依赖配置
- 优化文件存储路径和命名规范

tools/async_file_writer.py

@@ -0,0 +1,50 @@
+import asyncio
+import csv
+import json
+import os
+import pathlib
+from typing import Dict, List
+import aiofiles
+from tools.utils import utils
+
+class AsyncFileWriter:
+    def __init__(self, platform: str, crawler_type: str):
+        self.lock = asyncio.Lock()
+        self.platform = platform
+        self.crawler_type = crawler_type
+
+    def _get_file_path(self, file_type: str, item_type: str) -> str:
+        base_path = f"data/{self.platform}/{file_type}"
+        pathlib.Path(base_path).mkdir(parents=True, exist_ok=True)
+        file_name = f"{self.crawler_type}_{item_type}_{utils.get_current_date()}.{file_type}"
+        return os.path.join(base_path, file_name)
+
+    async def write_to_csv(self, item: Dict, item_type: str):
+        file_path = self._get_file_path('csv', item_type)
+        async with self.lock:
+            file_exists = os.path.exists(file_path)
+            async with aiofiles.open(file_path, 'a', newline='', encoding='utf-8-sig') as f:
+                writer = csv.DictWriter(f, fieldnames=item.keys())
+                if not file_exists or await f.tell() == 0:
+                    await writer.writeheader()
+                await writer.writerow(item)
+
+    async def write_single_item_to_json(self, item: Dict, item_type: str):
+        file_path = self._get_file_path('json', item_type)
+        async with self.lock:
+            existing_data = []
+            if os.path.exists(file_path) and os.path.getsize(file_path) > 0:
+                async with aiofiles.open(file_path, 'r', encoding='utf-8') as f:
+                    try:
+                        content = await f.read()
+                        if content:
+                            existing_data = json.loads(content)
+                        if not isinstance(existing_data, list):
+                            existing_data = [existing_data]
+                    except json.JSONDecodeError:
+                        existing_data = []
+            
+            existing_data.append(item)
+
+            async with aiofiles.open(file_path, 'w', encoding='utf-8') as f:
+                await f.write(json.dumps(existing_data, ensure_ascii=False, indent=4))