Addressed a `DeprecationWarning` in `RecordingFactory` related to the
`_after_postgeneration` method, which will stop saving the instance after
postgeneration hooks in the next major release. To resolve this,
`skip_postgeneration_save=True` was added to `RecordingFactory.Meta` to
avoid extraneous save calls. Alternatively, if instance saving is needed,
the save call can be moved to postgeneration hooks or by overriding
`after_postgeneration`.
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