Update changelog and fix CI formatting issues (#1796)

- Add changelog entry for doctor rake task fix (PR #1795)
- Add CLAUDE.md and docs/contributor-info/coding-agents-guide.md to .prettierignore
- Resolves CI formatting failures on internal documentation files

Author: justin808

.prettierignore

@@ -19,3 +19,7 @@ spec/dummy/public
 *.yaml
 # Intentionally invalid
 spec/react_on_rails/fixtures/i18n/locales_symbols/
+
+# Internal documentation - ignore formatting
+CLAUDE.md
+docs/contributor-info/coding-agents-guide.md

CHANGELOG.md

@@ -23,6 +23,10 @@ After a release, please make sure to run `bundle exec rake update_changelog`. Th
 
 Changes since the last non-beta release.
 
+#### Bug Fixes
+
+- **Doctor rake task**: Fixed LoadError in `rake react_on_rails:doctor` when using packaged gem. The task was trying to require excluded `rakelib/task_helpers` file. [PR 1795](https://github.com/shakacode/react_on_rails/pull/1795)
+
 ### [16.0.1-rc.0] - 2025-09-19
 
 #### Pro License Structure Implementation