Upgrade/ruby 3.4 rails 8.1

[alasdair-macleod]

Summary

This PR updates Roadmap to v6.0.0, upgrading the core runtime from Ruby 3.1/Rails 7.1 to Ruby 3.4/Rails 8.1.

Changes

• Upgrade Ruby to 3.4 and Rails to 8.1.
• Update compatible Ruby dependencies.
• Adapt authentication, enums, routes, exports and schema handling.
• Preserve PostgreSQL and MySQL support.
• Replace the incompatible model annotation tooling.
• Remove Spring.
• Update CI to Node 24 and current GitHub Actions runtimes.
• Pin Chrome for reliable feature tests.
• Add schema-drift checks and regression coverage.

This is a runtime and framework upgrade with no new product features or API versions.

Dependency updates

Runtime and framework

• Ruby 3.1.4 → 3.4.11
• Rails 7.1.5.2 → 8.1.4
• Bundler 2.4.17 → 2.7.2
• Node.js 18 → 24

Application dependencies

• api-pagination 6.0.0 → 7.1.0
• bootsnap 1.18.6 → 1.26.0
• devise 4.9.4 → 5.0.4
• devise_invitable 2.0.11 → 2.0.14
• dotenv-rails 3.1.8 → 3.2.0
• dragonfly 1.4.1 → 1.4.2
• flag_shih_tzu 0.3.23 → 1.0.6
• httparty 0.23.1 → 0.24.3
• jbuilder 2.14.1 → 2.15.1
• jwt 3.1.2 → 3.3.0
• mail 2.7.1 → 2.9.1
• net-smtp 0.5.1 → 0.5.2
• omniauth-rails_csrf_protection 1.0.2 → 2.0.1
• pg 1.6.2 → 1.7.0
• puma 7.0.4 → 8.0.2
• rack-attack 6.7.0 → 6.8.0
• recaptcha 5.21.1 → 5.21.2
• rollbar 3.6.2 → 3.8.0
• turbo-rails 2.0.17 → 2.0.23

Development and test dependencies

• binding_of_caller 1.0.1 → 2.0.0
• brakeman 7.1.0 → 8.1.0
• bullet 8.0.8 → 8.2.0
• bundle-audit 0.1.0 → 0.2.0
• byebug 12.0.0 → 13.0.0
• danger 9.5.3 → 9.6.1
• faker 3.5.2 → 3.8.0
• guard 2.19.1 → 2.20.2
• listen 3.9.0 → 3.10.1
• mocha 2.7.1 → 3.1.0
• parallel 1.27.0 → 1.28.0
• rack-mini-profiler 4.0.1 → 5.0.0
• rspec-rails 7.1.1 → 8.0.4
• rubocop 1.81.1 → 1.81.7
• rubocop-i18n 3.2.3 → 3.3.0
• rubocop-performance 1.26.0 → 1.26.1
• selenium-webdriver 4.32.0 → 4.50.0
• web-console 4.2.1 → 4.3.0
• webmock 3.25.1 → 3.26.4
• yard 0.9.37 → 0.9.45

Added direct dependencies

• annotaterb 4.24.0
• csv 3.3.6
• logger 1.7.0
• net-imap 0.6.7
• net-pop 0.1.2
• rake 13.4.2
• babel-plugin-dynamic-import-node 2.3.3

Removed direct dependencies

• annotate
• mimemagic
• ruby-progressbar
• spring
• spring-commands-rspec
• spring-watcher-listen

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