I stopped hardcoding model IDs. models.dev + /v1/models changed the workflow

The author has shifted away from hardcoding model IDs in their API gateway setup, now utilizing the models.dev platform and its new /v1/models endpoint to streamline the workflow. This change is crucial for maintaining flexibility and efficiency as models evolve and are updated. By moving away from static IDs, the setup becomes more adaptable to future changes and model iterations, enhancing the overall robustness of the API service.