12.12.3

Issues:

#2424 - Review error thrown when transaction register(Callback) called when no active transaction exists
#2422 #2423 - Use @NonNullApi to explicitly reflect non-null return types and params by default
#2418 - Change Database.beanState() to throw IllegalArgumentException when bean isn't an entity bean bug
#2420 - BeanState.loadErrors() returns empty map rather than null
#2421 - Change database.diff() to return empty map rather than null with null bean argument
#2419 - Add explicit @Nullable on findOne() methods
#2412 - Remove: ReadJson.resetContext as it is not used
#2411 - Weak reference based persistence context for streaming queries refactor
#2413 - Change DefaultPersistenceContect to use beginIterate / endIterate