We already have vinyl/select_consistency.test.lua, but judging by #3607, #3693, #4222, #4242, #4248, it looks like that it isn't enough. What's missing:

• Multi-statement transactions.
• Check that there's no phantom tuples.
• Multikey indexes.
• Non-unique indexes.
• More concurrent fibers.
• Dump triggered by exceeding memory limit.
• Recovery.