feat: 为openai分组增加messages调度开关和默认映射模型

backend/ent/migrate/schema.go

@@ -408,6 +408,8 @@ var (
 		{Name: "mcp_xml_inject", Type: field.TypeBool, Default: true},
 		{Name: "supported_model_scopes", Type: field.TypeJSON, SchemaType: map[string]string{"postgres": "jsonb"}},
 		{Name: "sort_order", Type: field.TypeInt, Default: 0},
+		{Name: "allow_messages_dispatch", Type: field.TypeBool, Default: false},
+		{Name: "default_mapped_model", Type: field.TypeString, Size: 100, Default: ""},
 	}
 	// GroupsTable holds the schema information for the "groups" table.
 	GroupsTable = &schema.Table{