feat(ci): run DetectorChecksum test

[wdconinc]

Briefly, what does this PR introduce?

This PR adds a test to make sure the DetectorChecksum works. Some detectors manage to do things that break it...

Needs:

• [x] #851
• [x] #852

What kind of change does this PR introduce?

• [ ] Bug fix (issue #__)
• [x] New feature (issue: some detectors manage to break checksum, so make sure that is surfaced)
• [ ] Documentation update
• [ ] Other: __

Please check if this PR fulfills the following:

• [ ] Tests for the changes have been added
• [ ] Documentation has been added / updated
• [ ] Changes have been communicated to collaborators

Does this PR introduce breaking changes? What changes might users need to make to their code?

No.

Does this PR change default behavior?

No.