### Description  If I create an issue and add it to a project, its `project_board_id` is 0, but it should not be. Instead, `project_board_id` should either be the value of the default board or board with lowest `sorting` ### Gitea Version 1.21.11+9-g0e20ccfe32 ### Can you reproduce the bug on the Gitea demo site? Yes ### Log Gist _No response_ ### Screenshots _No response_ ### Git Version _No response_ ### Operating System _No response_ ### How are you running Gitea? docker ### Database None