Introduces new ResourceColumnDataSource and ResourceHeaderRenderer to support column rendering by resources instead of dates
Enables dynamic calendar mode switching between date and resource views
Updates core managers and services to support async column retrieval
Refactors data source interfaces to use Promise-based methods
Improves calendar flexibility and resource management capabilities
Introduces comprehensive audit trail system with:
- AuditService to track entity changes
- SyncManager for background sync of audit entries
- New CoreEvents for entity and audit tracking
- Simplified sync architecture with event-driven approach
Prepares system for enhanced compliance and change tracking