Adding methods to delete backups on remote storage s3 and local. Some refactoring on models db and adding common.ts model with createdAt, updatedAt, and deletedAt.

src/db/utils/index.ts

@@ -0,0 +1,3 @@
+export function withUpdatedAt<T extends object>(data: T): T & { updatedAt: Date } {
+    return {...data, updatedAt: new Date()};
+}