feat : ajout d'un système de log pour les SUPER_ADMIN

frontend/services/dto/audit-log.ts

@@ -0,0 +1,12 @@
+export type AuditLog = {
+  id: number
+  employeeName: string | null
+  employeeId: number | null
+  username: string
+  action: string
+  entityType: string
+  description: string
+  changes: { old?: Record<string, unknown>; new?: Record<string, unknown> } | null
+  affectedDate: string | null
+  createdAt: string
+}