Fix gossipd node announcement ordering#8769

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rustyrussell wants to merge 3 commits intoElementsProject:masterfrom

rustyrussell:fix-gossipd-node_announcement-ordering

Commits on Dec 4, 2025

lightningd: fix crash on fixup scan if block unavailable.
rustyrussell
committed

Commits on Dec 8, 2025

pytest: add test to demonstrate gossip_store misordering node announcements.
rustyrussell
committed
gossipd: make sure we correctly move node announcement when *no* channel preceeds it in the gossip store.
rustyrussell
committed