Backport CORE-290 to 2.29 branch#5676

Merged

ihnorton merged 3 commits intorelease-2.29from

rr/release-2.29-core-290

Nov 6, 2025

Commits on Nov 5, 2025

chore: add `IndexedList::splice` method and other tweaks (#5670)
rroelke
committed
chore: refactor and improve test data structure `struct Fragment` (#5675)
rroelke
committed
bugfix: Fix dense fragment domains during global order write with maximum fragment size (#5655)
rroelke
committed