Project Management Tool

Build a production-ready project management platform with workspace isolation, board and task permissions, real-time collaborative updates, attachments, comments, and notification workflows. Define data models for memberships, projects, boards, lists, tasks, comments, attachments, and activity events. Address optimistic and server-authoritative updates for concurrent edits, auditability for task and permission changes, durable event processing for notifications, observability for sync failures, and resilience when attachment uploads or background processing jobs fail.