Drop company_id column from all 22 domain tables via migration.
Remove companyId from JWT payload, auth plugins, all service method
signatures (~215 occurrences), all route handlers (~105 occurrences),
test runner, test suites, and frontend auth store/types.
The company table stays as store settings (name, timezone). Tenant
isolation in a SaaS deployment would be at the database level (one
DB per customer) not the application level.
All 107 API tests pass. Zero TSC errors across all packages.
Replace unit_status and item_condition pgEnums with company-scoped lookup
tables that support custom values. Add account_payment_method table,
tax_exemption table with approve/revoke workflow, and CRUD routes for
processor links. Validate inventory unit status/condition against lookup
tables at service layer.
