ALB-031: batuta hf search returns placeholder data

## Description

`batuta hf search model "code completion python"` returns placeholder/mock results instead of live HuggingFace Hub data. None of the returned results are code completion models.

## Acceptance Criteria

- `batuta hf search model "code completion"` returns actual HF Hub results
- Results include relevant code models (CodeGen, StarCoder, phi, etc.)