docs(spec): replace the dead tracker citations in the manifest, dataset and permission liveness ledgers with the deciding commit, or the decision in words (#20772)

Part of #20234

Clause-②: no

In the `manifest`, `dataset` and `permission` liveness ledgers, a
tracker number that answers 404 is replaced. The note now cites the
commit that decided it (ruling C+D, form C), or, where the number alone
carried the meaning, says what was decided (form D). Only `note` and
`_note` strings change: no row's status, evidence, proof or date moves.
One `@objectstack/spec` patch changeset, because `liveness/` ships in
the package.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

https://claude.ai/code/session_01Sfe5YjBLwB9J3y8fvm2xq1

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: objectstack-fleet[bot]

.changeset/20234-liveness-ledger-provenance-anchors.md

@@ -0,0 +1,14 @@
+---
+'@objectstack/spec': patch
+---
+
+The `manifest`, `dataset` and `permission` liveness ledgers cite the commit that decided each note, or say the decision in words, instead of a tracker number that no longer resolves
+
+Clause-②: no
+
+Notes in these three ledgers named GitHub issues that no longer exist, so a reader could
+not tell why a row carries its verdict. Each such note now either names the commit that
+made the decision or, where the number alone carried the meaning, says what was decided. The
+`liveness/` ledgers ship in this package's tarball, which is why this is a release note at
+all. Note text only: no row's status, evidence, proof or date changes, and no schema,
+export or runtime behaviour changes.