Enhances event layout engine with advanced rendering logic

Introduces sophisticated event layout algorithm for handling complex scheduling scenarios

Adds support for:
- Grid and stacked event rendering
- Automatic column allocation
- Nested event stacking
- Threshold-based event grouping

Improves visual representation of overlapping and concurrent events

src/v2/constants/CoreEvents.ts

@@ -63,6 +63,9 @@ export const CoreEvents = {
   ENTITY_SAVED: 'entity:saved',
   ENTITY_DELETED: 'entity:deleted',
 
+  // Audit events
+  AUDIT_LOGGED: 'audit:logged',
+
   // Rendering events
   EVENTS_RENDERED: 'events:rendered'
 } as const;