repozo: exit with non-zero code in case of verification failure

[perrinjerome]

When verification failed, repozo prints a message on standard error, but the program always exits with a return code indicating a success. In case of error it's more natural to exit with an error return code.

[perrinjerome]

This is a trivial change, the script is changed to raise a VerificationFail that is catched here and used to set the return code:

ZODB/src/ZODB/scripts/repozo.py

Lines 827 to 828 in ff6c320

	except (RepozoError, OSError) as e:
	sys.exit(str(e))

quoting sys.exit doc https://docs.python.org/3.13/library/sys.html#sys.exit

any other object is printed to stderr and results in an exit code of 1. In particular, sys.exit("some error message") is a quick way to exit a program when an error occurs.

One visible change is that this only outputs the first error, but every errors are fatal so I was thinking it's not really important to have all error and this made the code a little simpler.

[perrinjerome]

Thank you @icemac