backport: Merge bitcoin#28618, 28639, 28320, 27829#7073

Open

vijaydasmp wants to merge 4 commits intodashpay:developfrom

vijaydasmp:Jan_2026_1

Commits on Dec 20, 2025

Merge bitcoin/bitcoin#28618: doc: assumeutxo prune and index notes

ryanofsky
authored and
vijaydasmp
committed
Merge bitcoin/bitcoin#28639: refactor: Remove unused nchaintx from SnapshotMetadata constructor, fix test, add test

fanquake
authored and
vijaydasmp
committed

Commits on Dec 27, 2025

Merge bitcoin/bitcoin#28320: test: Support riscv64 in get_previous_releases.py

fanquake
authored and
vijaydasmp
committed
Merge bitcoin/bitcoin#27829: rpc: fix data optionality for RPC calls.

achow101
authored and
vijaydasmp
committed