scripts/refresh-legacy-report-tables.sh: dumps only the 4 tables the
overpriced-internet report needs (account/delivery/service/product) from the
live legacy DB with --single-transaction (non-locking), verifies the dump is
complete before importing into the local legacy-db copy. ~20MB, seconds.
Creds read from a prod-only .refresh.env (gitignored; .env.example committed).
Used to refresh the copy from the 2026-05-22 snapshot to current
(service 66741→69233, account 15321→15706).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
