Fix Gitee embedding model URL error (#13553)

### What problem does this PR solve?

As title

### Type of change

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

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

internal/handler/llm.go

@@ -204,6 +204,7 @@ func (h *LLMHandler) Factories(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{
+		"code": common.CodeSuccess,
 		"data": filtered,
 	})
 }