test(coverage): add test for admin action, failures test and sync log

[logan496]

Description

Add of test to cover admin action, sync log and energy data and core/errors failures coverage

Closes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (code change that neither fixes a bug nor adds a feature)
• Documentation update
• Test addition or improvement
• Dependency update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

• Unit tests (flutter test)
• Widget tests
• Integration tests
• Manual testing on device/emulator

Checklist

• My code follows the project's coding style and conventions
• I have performed a self-review of my code
• I have commented complex code, particularly in hard-to-understand areas
• I have updated the documentation accordingly
• My changes generate no new warnings or analysis issues
• I have added tests that prove my fix is effective or my feature works
• New and existing unit tests pass locally (flutter test)
• Static analysis passes (flutter analyze)
• My commits follow the Conventional Commits specification

Security Considerations

• No secrets, keys, or credentials are exposed
• All external communication uses TLS/SSL
• Sensitive data is stored in secure storage (flutter_secure_storage)
• Input validation is applied at trust boundaries