Define AfterFind behavior for Eager connections

[aeneasr]

Description

At the moment, AfterFind is being executed before fetching any other relations (using Eager()). This is not documented very well and maybe even unexpected.

Steps to Reproduce the Problem

Have a model with at least one has_many relation defined and a value receiver AfterFind().

Expected Behavior

Three options:

1. Document this behavior as a limitation
2. Add another method such as AfterFindEager
3. Run AfterFind() after fetching relations if an eager connection is made.

[aeneasr]

It appears that AfterCreate and AfterUpdate are executed after all relations have been inserted when using Eager(). I would expect consistent behavior across callbacks.