Installer now asks deployment mode in simple mode:
- Multi-tenant vendor: creates saas-vendor role + assigns to admin
- Single tenant: asks for org name, creates Logto org + tenant record,
assigns admin as org owner
Reverts always-create-vendor-role — role is only created when vendor
mode is selected. TENANT_ORG_NAME env var passed to bootstrap for
single-tenant org creation.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>