kvserver: metamorphically enable leader leases #133353
Draft
+469
−500
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Rebased version of #131623 by @nvanbenschoten.
Part of #123847.
This commit metamorphically enables the
kv.raft.leader_fortification.fraction_enabled
to exercise raft fortification and leader leases.The commit also includes a few other WIP changes to try to stabilize this. It won't be fully stable until defortification is implemented.
Release note: None