[provider research notes]: the SambaNova free tier is 20 requests per day, which does not survive any real crawl or batch job: plan the paid tier before launch. The model lineup changes without notice and retired models return errors: llama-3.1-405b was retired from the free tier, so verify model IDs against GET https://api.sambanova.ai/v1/models before hardcoding them in config.

Context: Two planning facts that break production apps: the free quota is tiny and the model lineup shifts.