Bound automatic continuation retries

[danyel117]

Summary

• persist consecutive transport/no-response continuation failures and pending-attempt lifecycle across restarts
• retry only bounded recovery episodes, respecting the remaining minimum interval and native OpenCode retry/progress cancellation
• integrate watchdog rescues into the same failure ceiling without consuming auto-turn or no-progress budgets
• deduplicate paired idle/error events and recover stale pending attempts only after a plugin restart

Scope

This is the focused replacement for #19. It intentionally leaves package identity, public goal tools/statuses, state location, TUI behavior, prompts, safety defaults, and publishing unchanged.

The bounded-recovery design and live transport cases were adapted from @ruizkinio's work in #19. The commit also credits Sam Ruiz as co-author.

Verification

• bun run lint
• bun run typecheck
• bun test (99 passed)
• bun run build
• bun run pack:dry-run (5 published files)
• independent standards and specification reviews against origin/main

AI Assistance

Implemented and reviewed with OpenCode using openai/gpt-5.6-sol, including isolated code-worker and review subagents.