Pull in changes from upstream v4.3.0-beta.2
Changelog: v4.3.0-beta.0-jito...v4.3.0-beta.2-jito
Changes
- ci: exempt v4.3 from mergify EoL auto-close (#1593)
- v4.3: Fail closed atomic transactions on sad handover (backport of #1545) (#1591)
- v4.3: Prevent stale tip-crank configuration across BAM/Block Engine transitions (backport of #1561) (#1594)
- v4.3: feat: support tx v1 in bam receive and buffer (backport of #1552) (#1597)
- local-cluster: fix flaky alpenglow_basic_equivocation (cherry-pick of anza-xyz/agave#14778, test-only; not yet in the v4.3.0-beta.2 tag)