fixed relation

Created by: oblivisheee

This pull request includes changes to the subscription/src/db.rs file to enhance logging and improve error handling in the DBConnection implementation. The most important changes include adding a new import for the subscriber module and modifying the create_subscriber method to use a query function and handle errors more robustly.

Enhancements to logging and error handling:

• subscription/src/db.rs: Added the subscriber module to the list of imports from the tracing crate to enable more detailed logging.
• subscription/src/db.rs: Modified the create_subscriber method in the DBConnection implementation to use the query method with a function call for creating a subscriber, and added error handling for extracting subscriber data.