[Task]: Enhance PaddleOCR check_installation: verify access_token connectivity

### Parent Issue

#14736

### Detail of Subtask

Enhance PaddleOCR's check_installation to verify that the provided access_token can successfully reach the configured base_url (or the available check endpoint). This will help catch configuration issues early.

### Describe implementation you've considered

_No response_

Start at PaddleOCR's check_installation implementation and trace how the provided access_token and configured base_url are currently handled. Identify the available check endpoint, verify authenticated connectivity during installation checks, and confirm that configuration failures are reported clearly.

Written by the indexing model from the issue text.