fix(release): require exact-head approval for desktop tags (#3973)

## Summary
- require an exact-head trusted approval before desktop auto-tagging
- remove rule-suite authorization that `GITHUB_TOKEN` cannot access
- pin review pagination to `page=1` and test the deployed `gh` control
flow

## Why
The previous verifier unconditionally queried repository rule-suite
endpoints with `github.token`. Those endpoints require Administration:
read, which Actions `GITHUB_TOKEN` cannot receive. Its paginated list
request also duplicated page one when no explicit page was supplied.

This deliberately removes admin-bypass authorization rather than
introducing a second credential during release recovery. Desktop release
PRs must now have GitHub's overall `APPROVED` decision and a
MEMBER/OWNER/COLLABORATOR approval attached to the exact candidate SHA.

## Validation
- `scripts/test-desktop-release-authorization.sh`
- `scripts/test-release-ref-contract.sh`
- `bash -n scripts/verify-desktop-release-merge.sh
scripts/verify-desktop-release-authorization.sh
scripts/test-desktop-release-authorization.sh
scripts/test-release-ref-contract.sh`
- `git diff --check origin/main...HEAD`

The new flow test uses a stub `gh` executable, asserts the exact
`page=1` request, fails any rule-suite API call, and rejects stale-SHA,
untrusted-author, changes-requested review, and non-approved
aggregate-decision cases.

Signed-off-by: Wes <wesbillman@users.noreply.github.com>
Co-authored-by: Carl <c7ebe626f000404285d3686e1dc74cc07cc60a9754a150041ba132e14bd3e2ec@buzz.block.builderlab.xyz>

.github/workflows/auto-tag-on-release-pr-merge.yml

@@ -111,7 +111,6 @@ jobs:
           PR_HEAD_REF: ${{ github.event.pull_request.head.ref }}
           PR_BASE_REF: ${{ github.event.pull_request.base.ref }}
           PR_HEAD_REPO: ${{ github.event.pull_request.head.repo.full_name }}
-          MERGED_BY: ${{ github.event.pull_request.merged_by.login }}
           MERGE_SHA: ${{ github.event.pull_request.merge_commit_sha }}
         run: |
           VERSION="${VERSION#desktop-v}"