Issue Description

When an operation launches another operation, and both finish successfully, you will find that ado records the inner operation as having been successful and the outer operation as having "exited normally but a signal was sent" and the overall status set to error

How to reproduce

To reproduce currently you need to use the trim operator. Details TBA

Expected behaviour

Both operations should have status successful

Python/ado/system info

Please include the output of:

python 12.7
ado: 1.1.1.dev7
os: Mac