Add comprehensive unit tests for SearchApiClient covering:
- Route verification tests for all 6 methods (GetUserSearches, GetQueuedSearches,
GetSearch, CopySearch, CreateSearch, GetResults)
- Success tests verifying deserialization for all methods
- Representative error tests (404 for GetSearch, 401 for GetUserSearches)
Uses MockHttpMessageHandler to verify correct API routes are called
and ApiResult<T> pattern maps responses correctly.
Joseph Doherty