fix race in reintegration + down2up fix#17649

Draft

gnailzenh wants to merge 8 commits intomasterfrom

liang/rebuild/b_rebuild_fixes

Commits on Feb 28, 2026

DAOS-18487 rebuild: don't wait for discard
gnailzenh
committed

Commits on Mar 1, 2026

DAOS-18487 rebuild: code cleanup
gnailzenh
committed

Commits on Mar 2, 2026

Commits on Mar 3, 2026

DAOS-18487 rebuild: code simplification
gnailzenh
committed

Commits on Mar 4, 2026

DAOS-18487 rebuild: switch to non-relax version of atomic
gnailzenh
committed

Commits on Mar 5, 2026