### What problem does this PR solve?
this pr adds new tests, for the full configuration tab in datasests
### Type of change
- [x] Other (please describe): new tests
### What problem does this PR solve?
Move test files from utils/ to their corresponding functional
directories:
- api/db/ for database related tests
- api/utils/ for API utility tests
- rag/utils/ for RAG utility tests
### Type of change
- [x] Refactoring