[StuartFerguson]

Summary

• Replace the existing test mocking setup with Imposter.
• Update test projects and package configuration.
• Add shared Imposter generation support and migrate affected business logic tests.

Testing

• Updated unit test coverage across business logic and file processing scenarios.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 0 duplication

Metric	Results
Duplication	0

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