Feature: document history (audit log UI) (#6388)

src-ui/src/app/data/auditlog-entry.ts

@@ -0,0 +1,18 @@
+import { User } from './user'
+
+export enum AuditLogAction {
+  Create = 'create',
+  Update = 'update',
+  Delete = 'delete',
+}
+
+export interface AuditLogEntry {
+  id: number
+  timestamp: string
+  action: AuditLogAction
+  changes: {
+    [key: string]: string[]
+  }
+  remote_addr: string
+  actor?: User
+}