PostgreSQL model (reference)
workspaces → workspace_members → projects → roadmap_phases → milestones → tasks (+ assignees, labels, dependencies) · risks · technical_decisions · architecture_components · technology_stack_items · integrations · environments → deployments · documents · comments · notifications · audit_logs (append-only)
UUID PKs · created_at/updated_at everywhere · RLS on every table · full DDL contract in docs/database.md.