* ci: enforce changed-file TypeScript LOC ratchet
* ci: derive release-gate LOC base from PR
* test(ci): exclude repository test helpers from LOC ratchet
* ci: validate LOC ratchet on PR merge tree
* style: format release maintainer skill
* ci: run LOC ratchet for fast-only changes
* fix(ci): harden LOC ratchet comparisons
* fix(ci): cover native TypeScript in LOC ratchet
* fix(ci): compare LOC against tested merge tree
* test(ci): cover LOC manifest routing
Remove the hard 500-line TypeScript LOC ratchet from CI and local check planning, along with its package commands, implementation, baseline, and dedicated tests. Keep the remaining pull-request temp-creation report on its own pr-base fetch.\n\nVerification: 99 focused tooling tests; actionlint; zizmor; workflow guards; exact-head autoreview.