fix issue

app/services/ocr_service.py

@@ -102,7 +102,7 @@ class PaddleOCRProvider(OCRProviderBase):
     async def recognize(self, image_path: str) -> OCRResult:
         """使用 PaddleOCR 识别图片"""
         self._init_ocr()
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
 
         def _run_ocr():
             result = self._ocr.ocr(image_path, cls=True)
@@ -164,7 +164,7 @@ class AliyunOCRProvider(OCRProviderBase):
 
         import asyncio
 
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
 
         def _call_api():
             from alibabacloud_tea_openapi.models import Config
@@ -249,7 +249,7 @@ class TencentOCRProvider(OCRProviderBase):
         import base64
         import json
 
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
 
         def _call_api():
             from tencentcloud.common import credential