Problem: no error if SIP is missing top-level directory

[sallain]

Describe the bug

All SIPs should be structured like this, generally speaking:

my-package.zip
└── my-package
    ├── content
    └── header

Note the top-level directory, my-package.

SFA have reported that if the top-level directory is missing, the SIP then fails at the name check with the following error:

While this error is correct (the name is NOT compliant!), it looks like Enduro is creating a random placeholder directory which allows it to pass earlier validations.

To Reproduce

Steps to reproduce the behavior:

1. Make a zipped package where the top-level directories are content and header
2. Run it

Expected behavior

A package with this structure should fail earlier in the workflow, possibly at Identify SIP structure.

Screenshots

Additional context

[djjuhasz]

@sallain I think the best place to validate the top-level directory is in the "Validate SIP structure" activity, which comes right after "Identify SIP structure" and right before "Validate SIP name". Let me know if you disagree.

[sallain]

@djjuhasz Sure, that makes sense to me!