docs(squad): log mega triage session

- Crash recovery: merged 10 PRs, closed 3 duplicates
- Repo hygiene: removed test artifacts, consolidated .gitignore, cleaned garbage files, pruned 21 local + 31 remote branches
- Issue triage: 12+ issues routed and closed
- PR management: merged #628 (model config), reviewed #629, routed Tamir PRs to dev branch pending proposals

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
