chore(openspec): archive fix-upgrade-unresolved-latest-crash

[Drswith]

Summary

Archive completed OpenSpec change fix-upgrade-unresolved-latest-crash after its implementation PR (#700) merged, syncing the accepted self-upgrade deltas into openspec/specs/.

Main specs now require structured NETWORK_ERROR / check-unavailable when latest version cannot be resolved on plain upgrade, --check, and dry-run, and keep MANUAL_ACTION_REQUIRED for non-auto-update install sources under --check / dry-run.

Also adds a one-line keep comment under src/lifecycle/ so classify sets run_test_matrix=true and test (macos-latest) actually runs (protect-main requires it; pure openspec PRs would otherwise skip macOS).

Rebased onto main after Release PR #706 (chore: release 1.13.1).

Linked Artifacts

• Issue: fix(upgrade): return NETWORK_ERROR when latest version cannot be resolved #700
• OpenSpec: fix-upgrade-unresolved-latest-crash

Validation

• bun run openspec:validate
• bun run memory:check
• bun run lint
• bun run format:check
• bun run typecheck

bun run test is not applicable for behavior: the only src/ edit is a one-line keep comment with no runtime effect. Full CI matrix (including macOS) is expected after this push.

Release Intent

• Release: not applicable - OpenSpec archive closure only

Release Summary

• Not applicable - OpenSpec archive closure does not produce a release entry. Patch changelog for the upgrade fix is already covered by the fix(upgrade): return NETWORK_ERROR when latest version cannot be resolved #700 commit override.

Docs Updated

• openspec/...

Scope Check

• I did not add a new ad hoc root-level Markdown file.
• I updated the relevant issue, ADR, spec, runbook, or captured the missing doc work as follow-up.
• I did not silently expand project scope without recording it explicitly.

Closure Check

• Working tree was clean before archive closure started.
• Branch was pushed and this PR is the active delivery artifact.
• OpenSpec change is already archived or queued for agent-driven archive closure.
• Release is not applicable, delegated to release automation, or verified.

Notes

• Generated by bun run openspec:archive-closure -- fix-upgrade-unresolved-latest-crash --apply-specs. The generated openspec/changes/archive/2026-09-06-fix-upgrade-unresolved-latest-crash/ directory was removed rather than committed, matching docs(openspec): archive the stop-advisory-ci-schedules change #682 and every archive PR since 2026-08-16.
• Product-path keep comment in src/lifecycle/uninstall-postcondition.ts is only to satisfy protect-main's required test (macos-latest) without changing protect-main or workflow YAML.
• No YAML. No SDK. No other OpenSpec changes.