[v2.15.18](https://github.com/ash-project/ash/compare/v2.15.17...v2.15.18) (2023-10-17)
Bug Fixes:
* honor `max_concurrency` option
* handle generic actions in `list_arguments_and_attributes`
* fix type casting for embedded resources
* ensure after action hooks are run on bulk creates
* return records from batches if items have after action hooks
* don't transform errors to changesets when rolling back in with_hooks
* undo previous changes where transactional actions might not roll back
* undo regression where errors weren't wrapped in a changeset
* provide full constraints when determining `Ash.Type.NewType` storage types
* go back to original default timestamp behavior
Improvements:
* various optimizations and compile time caching
* set default many to many options (#737)
* various performance improvements
* various optimizations for bulk create actions
* support `max_concurrency` option on bulk creates
* better error message on missing identities
* better error message on invalid data passed to `YourApi.load`
* better handling of nested errors in transactions