refactor: Use KnoraRepo instead of MessageRelay in ResourcesResponderV2

[seakayone]

Pull Request Checklist

Task Description/Number

Issue Number: DEV-

PR Type

• build/chore: maintenance tasks (no production code change)
• docs: documentation changes (no production code change)
• feat: represents new features
• fix: represents bug fixes
• perf: performance improvements
• refactor: represents production code refactoring
• test: adding or refactoring tests (no production code change)

Basic requirements for bug fixes and features

• Tests for the changes have been added
• Docs have been added / updated

Does this PR introduce a breaking change?

• Yes

Does this PR change client-test-data?

• Yes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ff9df5f) 11.63% compared to head (b424d48) 86.64%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2927       +/-   ##
===========================================
+ Coverage   11.63%   86.64%   +75.00%     
===========================================
  Files         247      247               
  Lines       22922    22923        +1     
===========================================
+ Hits         2668    19861    +17193     
+ Misses      20254     3062    -17192     

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