- Add InvitationStatus enum (pending/accepted/declined/expired)
- Add WorkspaceInvitation entity to track invitation lifecycle
- Store inviter, invitee email, role, and invitation token
- Track status, expiration, and acceptance time
- Foundation for workspace invitation system
Phase 4 Task 11/68 completed
- Add WorkspaceMemberRole enum (owner/admin/member/viewer)
- Add WorkspaceMember entity to track user membership in workspace
- Track invited_by for audit trail
- Track joined_at for membership timeline
- Foundation for multi-tenant permission system
Phase 4 Task 10/68 completed
- Add username field
- Add password_hash for bcrypt hash storage
- Add email_verified and email_verification_token for email verification
- Add password_reset_token and password_reset_expires_at for password reset
- Add last_login_at and last_login_ip for login tracking
- Backward compatible with existing code (all new fields have defaults)
Phase 4 Task 5/68 completed
- domain: Asset.tags field with add_tag/remove_tag methods
- validation: no empty tags, auto deduplication
- tests: 5 integration tests (add/remove/duplicate/empty/idempotent)
- all 13 tests passing
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