feat: support pox-5#2357

Draft

brady-stacks wants to merge 14 commits intostx-labs:mainfrom

brady-stacks:feat/pox-5

Commits on Apr 8, 2026

fix bitcoin script and epoch timings
brady-stacks
committed

Commits on Apr 9, 2026

Commits on Apr 10, 2026

fix tests
brady-stacks
committed

Commits on Apr 13, 2026

put epoch 3.5 back to optional
brady-stacks
committed

Commits on Apr 14, 2026

Merge branch 'main' into feat/pox-5
brady-stacks
authored