* Use AtomicPyTypeFlags in PyType_FromSlots
PyType_FromSlots still imported the old PyAtomicTypeFlags name.
Assisted-by: Grok:4.7
* Pass CPython test args as a bash array
Assisted-by: Grok:4.7
* Bump workspace version to 0.6.1
Assisted-by: Grok:4.7
* Restore the CPython test step in ci.yaml
Assisted-by: Grok:4.7