chore: add automatic Go formatting hooks
- Add Claude hook (.claude/settings.json) to run gofumpt after editing .go files
- Fix .golangci.yml Go version to 1.24 to match golangci-lint build version
- Pre-commit hook updated to use full path for golangci-lint
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>