** How does it work?
./revisions directory. Files are sorted by a timestamp
*** Immutable update files
The contents of an update file should be hashed and (manually) saved. When doing a rollback,
the hash can be compared to verify that the update file is indeed the same as when the update
was executed.
*** The database context
To remain completely agnostic, the database connection should be defined in the initial
configuration and passed to each method as the the context. There will be no assumptions about
the database and no API for interacting with database objects.
*** Detect version
*** Database table design
- Version
- Activity log
-