93ccf1b182
Tier 2 wrote 23 working scripts to scripts/tier2/ during the send_result_to_send_20260616 track. These were scaffolding for the rename work, not part of the codebase. Move them to scripts/tier2/artifacts/ so the base scripts/tier2/ directory stays clean (it should only contain the production code: failcount.py, run_track.py, write_report.py, setup_tier2_clone.ps1, run_tier2_sandboxed.ps1, fetch_tier2_branch.ps1). Per user feedback 2026-06-17: throw-away scripts are kept (for archival) but live in a dedicated subdir, not in the production namespace.