Use type classing for getting values from `QueryResult`/`QueryResultRow`

### Description of Technical Debt

Getting values from `QueryResult`/`QueryResultRow` classes is hard-coded making it complicated to add custom or extended types retrieval.

### Impact of Technical Debt

* complicates, perhaps even makes it impossible, to gather non-standard types from DB query results.

### Category

Code Quality / Refactoring

### Priority

Medium - Should be addressed soon

### Proposed Solution

Use type classing.