Implement SHA256 hashing for user authentication tickets before storage. This prevents sensitive tokens from being stored in plain text, significantly improving security.
Changes include:
* Hashing tickets in `AccountRouteHandler` and `UbiservicesRouteHandler` during profile updates and login flows.
* Introducing dedicated `updateUserTicket` methods in `AccountRepository` and `AccountService`.
* Adjusting the `Account` model to handle tickets separately.
* Adding a new `config` table to the database schema.
Introduces a new GET route handler for `/v3/users/:user` in `UbiservicesRouteHandler.js`. This handler is currently stubbed and sends an empty response.
Also, refactors anonymous function syntax in `AccountRepository.js` to use arrow functions for consistency.
