fix(server): recover OpenCode status reconciliation

Retain pending admission after transient status failures and use one generation-owned retry worker. Ignore stale timers and duplicate evidence so older prompts cannot finish newer steering.

Finding: R14 status reconciliation

Model: GPT-5.6 Sol via Codex
709dcdf6faJulius Marminge committed on 9/1/2026, 4:33:03 AMparent0c67966
2 files changedLine totals unavailable