Status: done

# 18 — DOC: Operational runbooks (stubs)

## What to build

Add operational runbook stubs for alpha operators under `docs/runbooks/` (or `.scratch/alpha-hardening/runbooks/` until close-feature):

1. **Ledger backup** — billing SQLite, accounts SQLite, registry DB paths; gossip pause procedure
2. **Treasury key rotation** — devnet mock-USDT mint + treasury keypair rotation without double-credit
3. **Upgrade path** — tracker rolling restart with persisted strike/reputation (post issue 05)

## Acceptance criteria

- [ ] Three markdown runbook stubs with prerequisites, steps, rollback
- [ ] Reference ADR-0015 settlement loop and ADR-0016 trust assumptions
- [ ] Secrets handling: never commit `.env.devnet`, keypairs
- [ ] No production code changes

## ADR links

- [ADR-0015](../../docs/adr/0015-usdt-custodial-settlement.md)
- [ADR-0016](../../docs/adr/0016-alpha-scope-and-known-limitations.md)

## Blocked by

None (stubs can land before issue 05; update after persistence ships)