This is a neverending debate, but I disagree to the extent that CRC jobs can vary significantly in terms of how involved in the research they are and their contributions to the team. I really need to know what duties the job entailed in order to evaluate the position.
That said, I also agree that your gap year job isn't going to help your app if you haven't started it by the time you submit your primary. As far as prospective schools know, the research program could have their funding pulled and you wind up not starting that job after all, or you could get there and the duties could be completely different from what they told you when you interviewed, or you might quit after a month to deal with a family emergency. Bottom line is that plans change, and projected hours/activites are taken with a fistful of salt. Where it may help you is that it will give you something interesting to talk about once you advnce to an interview, but it likely will not help you get the interview in the first place.