[GREEN] Updater, signing, and release promotion

[ksamaschke]

Scoped Behavior Slice

Implement the minimum production change required to make 'Updater, signing, and release promotion' pass.

Test Command or Verification Path

• Re-run the failing RED verification first.
• Run nearby focused regression coverage after the scoped implementation passes.

Required Evidence Format

• Link passing evidence back to the RED work-item.
• Capture the exact command(s) proving the scope is now green.

Tracking

• Type: work-item
• Phase: green

Parent: #182

[ksamaschke]

Completed as part of merged story #182 in PR #197 (merge commit , implementation commit ). The GREEN implementation for updater/signing/release-promotion shipped on \ with the real desktop updater and release packaging flow. Closing stale TDD child issue.

[ksamaschke]

Completed as part of merged story #182 in PR #197 (merge commit 9f8cebb, implementation commit c1f2436). The GREEN implementation for updater/signing/release-promotion shipped on dev with the real desktop updater and release packaging flow. Closing stale TDD child issue.