docs(0.17): sync ickb_progress.md with current code state

- Fix branch name: cellscript-0.17 → research/protocol-equivalence
- Update worktree status: uncommitted → clean (all in 9312bb2)
- Mark previously untracked paths as now tracked
- Add latest commit reference (9312bb2)
- Bump milestone percentages for Script identity, filtered MetaPoint
- Refine 下一步 columns for Script API and MetaPoint map milestones

Author: a19q3