Add checkpoints after the November 2025 network upgrade

Summary: As per title. Similar to D18096

Test Plan:
run the node, check that it accepts new blocks on the correct tip

Run ibd

Reviewers: #bitcoin_abc, Mengerian, Fabien

Reviewed By: #bitcoin_abc, Mengerian, Fabien

Subscribers: Mengerian

Differential Revision: https://reviews.bitcoinabc.org/D18941