Implement managed storage APIs for extensions with automatic namespace
isolation. Storage is automatically bound to extensions before module
execution, ensuring data privacy between extensions.
- Tier 1 (localState/sessionState): Browser-based storage with user isolation
- Tier 2 (ephemeralState): Server-side cache with TTL support
- Update webpack externals to support subpath imports like @apache-superset/core/storage
- Add storage documentation and update architecture docs
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
