Confusing error message when prefix missing trailing slash

[jwhartley]

Problem

When using flowctl catalog list --prefix Maverick_Automation (without trailing slash), the error message is:

user is not authorized to Maverick_Automation

This is confusing because the user IS authorized - the issue is just the missing trailing slash.

Expected Behavior

Either:

1. Accept the prefix without trailing slash, OR
2. Provide a clearer error message like: "Prefix must end with '/' - did you mean 'Maverick_Automation/'?"

Steps to Reproduce

# This fails with confusing auth error:
flowctl catalog list --prefix Maverick_Automation

# This works:
flowctl catalog list --prefix Maverick_Automation/

[burnerlee]

hello @jwhartley is it okay if I raise a PR to fix this issue?