refac: ollama embed form data

backend/open_webui/routers/ollama.py

@@ -1020,6 +1020,10 @@ class GenerateEmbedForm(BaseModel):
     options: Optional[dict] = None
     keep_alive: Optional[Union[int, str]] = None
 
+    model_config = ConfigDict(
+        extra="allow",
+    )
+
 
 @router.post("/api/embed")
 @router.post("/api/embed/{url_idx}")