release(truth): correct every published inventory number and record PR #1 ancestry

[lidge-jun]

The published product does not describe the shipped payload.

Measured ground truth (2026-08-15, branch dev)

Inventory	Truth
Skills	28
Hooks (disk == manifest)	21
Components	8
Tests	1,631 pass / 0 fail
Latest release	v0.1.0 (2026-07-06), zero assets

PR #1 ancestry, resolved

git merge-base --is-ancestor origin/pr1head origin/main  -> 1   (head 8f2efab not an ancestor)
git merge-base --is-ancestor dac77cc7 origin/main        -> 0   (squash commit IS on main)

PR #1 was squash-merged as dac77cc7 on 2026-08-09. The runtime hardening is on main but has never appeared in a published release.

Drift to close — High severity rows first:

• README.ko.md:57,106 and README.zh.md:57,106 say 18 hooks; there are 21.
• docs-site/.../reference/hooks.md, .../reference/plugin-manifest.md, .../concepts/how-it-works.md all publish an 18-hook table missing session-start-detecting-managed-worktree, user-prompt-submit-guiding-worktree-rename, pre-tool-use-guarding-managed-worktree-deletion.
• docs-site/.../guides/skills.md documents cxc-ultraresearch, which does not ship (absorbed into search), lists 25 skills, and omits dev-diagram-viewer, kwrite, remote, worktree-guardian.
• structure/INDEX.md skills map is missing three skills and lists ultraresearch; the component map omits skill-search; eight devlog/_plan/mvp_* paths moved to _fin/.
• All three READMEs and docs-site claim 1,213 tests.

Plan: devlog/_plan/260815_release_train_production/010_release_truth.md. Also adds CHANGELOG.md.

[lidge-jun]

Closed by 61bbcf7, shipped in v0.2.0-beta.1.

Every published number now matches the payload, verified on the release commit 27ed3b2:

	before	after
tests	1,213	1,660
hooks (ko/zh + docs site)	18	21
skills	25–27	28

Also fixed: the three managed-worktree hooks now appear in reference/hooks.md, reference/plugin-manifest.md and concepts/how-it-works.md; cxc-ultraresearch was removed from the docs site, structure/INDEX.md, 60_native_capabilities.md and the skill-hub catalog (it stopped shipping when the protocol moved into cxc-search Tier 3); the dead devlog/_plan/mvp_* paths now point at _fin/; and the missing skill-search component section was added.

PR #1 ancestry, resolved:

git merge-base --is-ancestor origin/pr1head origin/main  -> 1   (head 8f2efab rewritten)
git merge-base --is-ancestor dac77cc7 origin/main        -> 0   (squash commit IS on main)
gh pr view 1 --json mergedAt                             -> 2026-08-09T01:18:41Z

The runtime hardening was merged but had never appeared in a published release. It ships publicly for the first time in v0.2.0-beta.1.

The structure/INDEX.md path check reported 7 dead paths before and 0 after — the before-observation matters, since a check that reports nothing in both directions is not observing anything.