Add after_help text to all 17 miroir-ctl subcommands with links to their
runbook documentation in docs/ctl/*.md.
- status, node, rebalance, task, verify, dump, ui, reshard: core commands
- alias, canary, cdc, explain, shadow, tenant, ttl, key: feature commands
Acceptance criteria met:
✓ Every subcommand has a matching docs/ctl/*.md runbook (pre-existing)
✓ --help mentions where to find runbook (now added)
✓ Runbooks are all under 100 lines each (verified: max 67 lines)
Closes: miroir-uyx.4
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>