fix(utils): normalize camelCase thinking param keys to snake_case#21762

1 commit merged intoBerriAI:litellm_oss_staging_02_21_2026BerriAI/litellm:litellm_oss_staging_02_21_2026from

Chesars:fix/normalize-thinking-camelcaseChesars/litellm:fix/normalize-thinking-camelcaseCopy head branch name to clipboard