chore: retired fork still runs weekly upstream-sync (4 consecutive failures) #382

What is wrong

This fork is retired (its description says "Deprecated, old opencode fork for amicode"; amicode's packages/app-bundle/overlay/ is the engine source of truth per amicode AGENTS.md). Its scheduled upstream-sync.yml still runs weekly and has failed four weeks running (2026-10-12, 10-19, 10-26, 11-02; the 11-02 log ends in a Python JSONDecodeError). Dependabot also still opens PRs here (test/typecheck failing on 2026-11-03).

Repo state: 14 open PRs (12 older than 30 days), 216 branches, 26 open Dependabot alerts (1 critical, 11 high).

Proposed

• Disable the upstream-sync schedule (and Dependabot version updates) now — reversible, stops the red runs.
• Archiving the repo is a human decision (listed in the audit's archive list). Before archiving: 4 checkouts on erlich (~/harmoniqs/opencode*, ~/armonia/repos/opencode) and 2 on the mini still have this as origin.

Found by the 2026-11-04 repo audit.