## Description
The `annotate` gem has been deprecated and users are experiencing
annotation errors with the new Rails 7 `serialize` syntax. This PR
migrates to `annotaterb`, the actively maintained fork.
Users reported errors when running `make db`:
```
Unable to annotate app/models/installation_config.rb: no implicit conversion of Hash into String
Unable to annotate app/models/installation_config.rb: no implicit conversion of nil into Array
```
This PR updates the Gemfile and rake configuration to use `annotaterb`
instead.
Fixes#11673
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
Tested locally with the following steps:
1. Run `bundle install` - successfully installed annotaterb 4.20.0
2. Run `RAILS_ENV=development bundle exec rails db:chatwoot_prepare` -
completed without annotation errors
3. Run `RAILS_ENV=development bundle exec rails annotate_rb:models` -
successfully annotated all models including InstallationConfig
4. Verified InstallationConfig model annotations are present and correct
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] My changes generate no new warnings
- [x] New and existing unit tests pass locally with my changes