fix: standardize errors to track with commonalities

[caubut-charter]

What type of PR is this?

bug

What this PR does / why we need it:

Errors are currently not in alignment with Commonalities.

Which issue(s) this PR fixes:

Fixes #29

Special notes for reviewers:

Changelog input

fix: Updates error responses to align with Commonalities.

Additional documentation

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: caubut-charter / name: Christopher Aubut (d75ab54, f8b2128, b21c691, 7e169f2, 6b15206, baa0ced, 93561ed)

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	2		0	0.03s
✅ OPENAPI	spectral	1		0	3.29s
✅ REPOSITORY	git_diff	yes		no	0.01s
✅ REPOSITORY	secretlint	yes		no	0.76s
✅ YAML	yamllint	1		0	0.69s

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[RandyLevensalor]

@caubut-charter Are all of the methods that have a 501 message optional for this API?

If the method is required, I'm not sure we want to support the 501 error on those.

[caubut-charter]

@caubut-charter Are all of the methods that have a 501 message optional for this API?

If the method is required, I'm not sure we want to support the 501 error on those.

@RandyLevensalor removed the 501 from minimal set of endpoints which is isolated-networks with the default device so no service sites or devices related endpoints.

[RandyLevensalor]

LGTM