investigate BLMOVE and related migrations

[skeggse]

It looks like Redis has deprecated BRPOPLPUSH in favor of BLMOVE. It might be prudent to think about the future of bee-queue in this light, along the lines of Redis streams and bee-queue's usage patterns. Along those lines, what would appropriate support for data/Redis migrations look like if we have to move to BLMOVE?

[crabmusket]

The Redis documentation seems to indicate that BLMOVE can be a drop-in replacement for BRPOPLPUSH, fortunately - though it seems LMOVE was only introduced in Redis 6.2, so there may be compatibility concerns.