Add gh-aw agentic fix for codegen build failures

- Create codegen-agentic-fix gh-aw workflow for fixing mvn verify
  failures after code generation changes
- update-copilot-dependency: run mvn verify after codegen, trigger
  agentic fix on failure before creating PR
- codegen-check: commit regenerated files back to PR branch, run
  mvn verify, trigger agentic fix on failure

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: edburns