feat: update free plan rules of spark (#1515)

api/core/third_party/spark/spark_llm.py

 
 class SparkLLMClient:
     def __init__(self, model_name: str, app_id: str, api_key: str, api_secret: str, api_domain: Optional[str] = None):
-
-        domain = 'spark-api.xf-yun.com' if not api_domain else api_domain
+        domain = 'spark-api.xf-yun.com'
+        endpoint = 'chat'
+        if api_domain:
+            domain = api_domain
+            if model_name == 'spark-v3':
+                endpoint = 'multimodal'
 
         model_api_configs = {
             'spark': {
         api_version = model_api_configs[model_name]['version']
 
         self.chat_domain = model_api_configs[model_name]['chat_domain']
-        self.api_base = f"wss://{domain}/{api_version}/chat"
+        self.api_base = f"wss://{domain}/{api_version}/{endpoint}"
         self.app_id = app_id
         self.ws_url = self.create_url(
             urlparse(self.api_base).netloc,