This PR adds new granular tokens per minute columns to the `models` table in preparation for more fine-grained rate limits. The following columns have been added: - `max_input_tokens_per_minute` - `max_output_tokens_per_minute` These mirror the "Maximum input tokens per minute (ITPM)" and "Maximum output tokens per minute (OTPM)" [rate limits from Anthropic](https://docs.anthropic.com/en/api/rate-limits#rate-limits). Release Notes: - N/A