### What problem does this PR solve? OpenAI has deprecated the gpt-4-vision-preview model. This PR adds support for the newer gpt-4o and gpt-4o-mini models in the img2text feature.  This PR add addtional 4o/4o-mini entry for img2text besides original ones. Utilized [alias](https://platform.openai.com/docs/models#gpt-4o) model names (e.g., gpt-4o-2024-08-06) because the database schema uses the model name as the primary key. - [x] Other (please describe): model update