fix(git-tools): sanitize WP5b for the public-package gates (review identity scrub + tool index)

verify-sanitized denylist: an operator-identity token in a ci-queue-wait
comment (spec finding references genericized - the framework-PR
firewall applies to shipped files). check-tools-index: repo-decl.sh
shipped means documented in the resident index in the SAME commit, and
executable. Full sanitization CI step replayed green locally
(verify-sanitized, resident budget x2, enumeration guard, tools index
x2).

packages/mosaic/framework/defaults/TOOLS.md

@@ -23,6 +23,7 @@ absent. Do not use raw `tmux send-keys` for fleet messaging.
 ```bash
 tools/git/pr-create.sh ...   tools/git/issue-create.sh ...   tools/git/pr-merge.sh ...
 tools/git/ci-queue-wait.sh --purpose push|merge   # REQUIRED before any push/merge
+tools/git/repo-decl.sh                            # shared .mosaic/repo.json consumption lib (sourced)
 ```
 
 **GITEA_LOGIN gotcha** — the wrappers default to login `mosaicstack`; on a USC repo that fails with