MigrateDatabase migrates the database to the latest version.

NewConnection creates a new database connection using the provided configuration.

NewErrorHandler creates a new ErrorHandler based on the provided configuration.

NewDB creates a new in-memory SQLite database with the necessary schema for testing purposes.

ErrDuplicatePrimaryKey is returned when an insert operation fails because the primary key already exists.

ErrNotFound is an error that occurs when a statement does not return any rows.

ErrOperationFailed is a fallback error for when an operation fails.

ErrUniqueConstraint is an error that occurs when a unique constraint is violated.

Config represents the configuration for a database connection.

ErrorHandler is an interface for handling database errors.