PhoenixKit module: manufacturing.
Provides a dashboard plus a Machines reference book — machines with
full CRUD and activity logging, plus many-to-many links to machine types
and operations. Machine types, operations, and defect reasons are
phoenix_kit_entities-backed directories (migration V5) rather than
module-owned CRUD — see PhoenixKitManufacturing.EntitiesRegistry and
dev_docs/ENTITIES_MIGRATION_SPEC.md. Production orders and warehouse
integration are planned in later milestones (see
dev_docs/DEVELOPMENT_PLAN.md).
Tables are created by PhoenixKit core (V144); the module ships no migrations of its own.