Fix: bytes style image issue. (#9304)

### What problem does this PR solve?

#9302

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/settings.py

 # sandbox-executor-manager
 SANDBOX_ENABLED = 0
 SANDBOX_HOST = None
-STRONG_TEST_COUNT = int(os.environ.get("STRONG_TEST_COUNT", "32"))
+STRONG_TEST_COUNT = int(os.environ.get("STRONG_TEST_COUNT", "8"))
 
 BUILTIN_EMBEDDING_MODELS = ["BAAI/bge-large-zh-v1.5@BAAI", "maidalun1020/bce-embedding-base_v1@Youdao"]
 

rag/llm/cv_model.py

         if not images:
             return text
 
-        if isinstance(images, str):
+        if isinstance(images, str) or "bytes" in type(images).__name__:
             images = [images]
 
         pmpt = [{"type": "text", "text": text}]

rag/utils/s3_conn.py

         self.access_key = self.s3_config.get('access_key', None)
         self.secret_key = self.s3_config.get('secret_key', None)
         self.session_token = self.s3_config.get('session_token', None)
-        self.region = self.s3_config.get('region', None)
+        self.region_name = self.s3_config.get('region_name', None)
         self.endpoint_url = self.s3_config.get('endpoint_url', None)
         self.signature_version = self.s3_config.get('signature_version', None)
         self.addressing_style = self.s3_config.get('addressing_style', None)
                     'aws_secret_access_key': self.secret_key,
                     'aws_session_token': self.session_token,
                 }
-            if self.region:
-                s3_params['region_name'] = self.region
+            if self.region_name:
+                s3_params['region_name'] = self.region_name
             if self.endpoint_url:
                 s3_params['endpoint_url'] = self.endpoint_url
             if self.signature_version:
             
             self.conn = [boto3.client('s3', **s3_params)]
         except Exception:
-            logging.exception(f"Fail to connect at region {self.region} or endpoint {self.endpoint_url}")
+            logging.exception(f"Fail to connect at region {self.region_name} or endpoint {self.endpoint_url}")
 
     def __close__(self):
         del self.conn[0]