## Summary
- Only trigger visual regression on `CI UI` workflow (drop `CI Front`)
- Remove tarball re-packaging step — `ci-privileged` now downloads the
artifact directly via GitHub API
- Remove `mode`/`project` parameters from the dispatch payload
(hardcoded to twenty-ui in ci-privileged)
- Pass `run_id` of the triggering CI UI workflow so ci-privileged can
fetch the correct artifact
## Context
Part of the fast visual regression CI initiative. The `ci-privileged`
workflow has been simplified to only handle `twenty-ui` screenshots
uploaded directly to Argos.
## Test plan
- [x] Full E2E verified on production: screenshots → Argos build → diff
results → PR comment
b53f1832d8