Relaxes the fail-closed install gate from #124037 per teknium1 review
2026-09-27 (known_issues informational; guard belongs at mode-selection seam):
- dashboard_install_plugin: no longer refuses known_issues entries — the text
flows into the result warnings plus a machine-readable "known_issues" key so
the UI can show it; the memory-provider migration paths (migrate_all_homes /
recover_at_startup via _install_into) install hindsight again in any mode.
- cmd_install: prints the yellow "Known issue:" lines but drops the TTY
requirement and the y/N confirmation; non-interactive installs proceed.
- entry_capability_summary: includes "Known issues: ..." so install prompts and
the catalog UI surface the text.
- scripts/validate_plugin_catalog.py: register known_issues in KNOWN_KEYS.
- tests: keep parse round-trip + install-summary display; drop the live-catalog
prose pin (test_live_catalog_hindsight_declares_known_issues) and the
zoneinfo import hack.
- contributors: map 5318happy@users.noreply.github.com -> happy5318.
113a63e853