Refactor - ScoreSquare offchain

[i001962]

Score Square was first deployed using a backend db to test the concept prior to building contract. That code is still in the repo & should be removed.

[imholders]

This confirms that "Score Square" originally used a database based backend (Supabase).

Solutions to remove this include:

1). Removing all related code from scoresquare.sol.
2). Removing references to the database in supabase.ts.
3). Updating the frontend code that points to this backend.
4). Cleaning up references in notifications.db if it holds related data.