Add config-driven stripUnsupportedParams helper and use it in the default and github executors. Removes the deprecated temperature param for claude-opus-4 models (Anthropic 400) and consolidates github's scattered capability checks into one rule table. Fixes #1748 Co-Authored-By: fjia <fjia@suntekcorps.com> Co-authored-by: Cursor <cursoragent@cursor.com>