Implements space composition and inheritance features:
- SpaceReference model for space-to-space references (includes, extends, links_to, composed_of)
- Variable inheritance through parent chain with local override
- Config inheritance with source tracking
- Access control models (SpacePermission, SpaceRole, AccessLevel)
- InheritanceResolver for walking parent chains
- AccessControlService for permission management
- ComposableSpaceService integrating all composability features
- Circular reference detection for EXTENDS references
- SQLite repositories for references and permissions
- 57 comprehensive unit tests
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
tegwick
727ce4d3c5