A lean site still gets every plugin's tables from the shared core Alembic
baseline. prune-schema drops the tables of plugins not installed on this
site, leaving core + chosen-plugin tables, with no edit to any released
migration (the relocate-into-plugin-baselines alternative would mean
rewriting ~15 released core migrations for a cosmetic gain - see ADR-014).
- shopdb/plugins/cli.py: prune-schema command. Dry-run by default; --yes to
execute; refuses non-empty tables without --force. Drops by table name (no
plugin import) so it works on a lean image. MySQL: private AUTOCOMMIT engine
(db.engine's pooled connections sit idle-in-transaction in a CLI context and
would deadlock the DROP on a metadata lock). SQLite: db.engine, restoring the
prior foreign_keys pragma so the StaticPool connection is not left changed.
- tests/test_plugin_prune_schema.py: drop-only-not-installed, full no-op,
refuse-non-empty, force-drops-non-empty.
- docs/DEPLOY.md: lean provisioning step after upgrade-all.
- ADR-014 ACCEPTED; index updated.
Verified on MySQL: full install then prune = no-op (86 tables); lean install
(machines+printers) then prune drops the other 19 plugin tables; second run
no-op. Full suite 1077 passed.
