feat: add backup replication contracts

ts/data/backup.ts

@@ -1,4 +1,12 @@
-export type TBackupStatus = 'pending' | 'running' | 'ready' | 'failed' | 'restoring' | 'restored';
+export type TBackupStatus =
+  | 'pending'
+  | 'running'
+  | 'replicating'
+  | 'replicated'
+  | 'ready'
+  | 'failed'
+  | 'restoring'
+  | 'restored';
 
 export type TBackupTrigger = 'manual' | 'scheduled';
 
@@ -37,6 +45,32 @@ export type TBackupSnapshot =
   | IBackupDatabaseSnapshot
   | IBackupObjectStorageSnapshot;
 
+export type TBackupReplicationTargetType = 's3' | 'smb';
+
+export interface IBackupArchiveObject {
+  path: string;
+  size: number;
+  sha256: string;
+}
+
+export interface IBackupArchiveManifest {
+  version: 1;
+  backupId: string;
+  createdAt: number;
+  objects: IBackupArchiveObject[];
+  totalSize: number;
+}
+
+export interface IBackupReplicationResult {
+  targetType: TBackupReplicationTargetType;
+  targetPath: string;
+  manifestPath: string;
+  manifestSha256: string;
+  objectCount: number;
+  totalSize: number;
+  completedAt: number;
+}
+
 export interface IBackupRestoreEvent {
   restoredAt: number;
   status: 'restored' | 'failed';
@@ -51,6 +85,7 @@ export interface IBackupRecord {
   status: TBackupStatus;
   trigger: TBackupTrigger;
   snapshots: TBackupSnapshot[];
+  replication?: IBackupReplicationResult;
   createdAt: number;
   updatedAt: number;
   completedAt?: number;