fix: Correct FileHash.compare to compare FileHash objects

[andy-cave-nf]

Contributes to #8269

Problem

Hiya, first time contributing. I wanted to improve the unit test coverage and as I was adding to FileHash I noticed a bug in FileHash.compare. It compares FileHash objects with strings rather than other FileHash objects.

Solution

I've correct the comparison to be against FileHash objects rather than against the checksum attribute, which is a string.
I've also added extra tests to bring that file up to 100% coverage.

Checklist

• I have read the contributing guide and understand what's expected of me.
• I have run this code in development, and it appears to resolve the stated issue.
• This PR includes tests, or tests are not required or relevant for this PR.
• This PR has no interface changes (e.g., macros, CLI, logs, JSON artifacts, config files, adapter interface, etc.) or this PR has already received feedback and approval from Product or DX.
• This PR includes type annotations for new and modified functions.

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[github-actions]

Additional Artifact Review Required

Changes to artifact directory files requires at least 2 approvals from core team members.

[codescene-delta-analysis]

Gates Failed
Enforce advisory code health rules (1 file with Code Duplication)

Gates Passed
3 Quality Gates Passed

See analysis details in CodeScene

Reason for failure

Enforce advisory code health rules	Violations	Code Health Impact
test_base_resource.py	1 advisory rule	10.00 → 9.39	Suppress

Quality Gate Profile: Clean Code Collective
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