Re-implement SERVER-56509. This improves the performance of inserts into uniques indexes.
Fix prefix search near optimisation to handle scenarios where the key range is split across pages.
Poor search near performance if a lot of data are invisible
Re-loading is slow with py-tpcc
stalling during concurrent insertMany operations when unique index exists
Avoid slow insert batches blocking replication
Wrap unique index insertion _keyExists call in a WT cursor reconfigure.