Extend RSpaceModule with scoping, lifecycle hooks (onInit, onSpaceCreate/Delete
with SpaceLifecycleContext, onSpaceEnable/Disable), and DocSchema support.
Add scoping to all 25 modules (8 space, 11 global-configurable, 6 global-fixed).
Consolidate 4 space creation endpoints into shared createSpace() function.
Add enabledModules enforcement middleware and module configuration API
(GET/PATCH /api/spaces/:slug/modules). Deprecation header on /api/communities.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>