Let us disable optimistic locking in `github.com/redis/rueidis/om`

[sgtsquiggs]

My use case is keeping a full text search cache up-to-date by consuming data off a kafka stream and upserting into Redis. Having Ver required to increment each update means I need to either keep the entire cache in memory so I know what my last version was, or fetching each object prior to updating. I'd like to see this field become optional.

[rueian]

Hi @sgtsquiggs,

Thanks for the suggestion. I agree that it will be better if we can make the Ver optional. Maybe add an option to the RepositoryOption.

[sgtsquiggs]

I've forked and am trying to do this now; I'll submit a PR if I'm successful