LoadSettings loads the serialized mutable settings from the database using the given `c` connection, assuming that the database schema version is equal to v1.2 as specified by the Major and Minor consts.

New creates a Migrator struct wrapping the given `tx` transaction from the destination database and `url` URL representing the source database connection information.

These constants define the major, minor, and patch version of the database schema which is managed by Migrator struct in this package.

These constants define the major, minor, and patch version of the database schema which is managed by Migrator struct in this package.

These constants define the major, minor, and patch version of the database schema which is managed by Migrator struct in this package.

Migrator implements Type generic interface in order to provide high-level database schema migration logic for the v1.2 schema.