v4.0.0

• Adds support for Ruby 3.3 and 3.4
• Adds support for Sidekiq 8.x
• Drops support for Sidekiq 6.x
• Drops support for Ruby versions that are now end-of-life (Ruby 2.7.x - Ruby 3.1.x)
• BREAKING CHANGE: Introduces breaking changes in job timestamp storage in Redis
• BREAKING CHANGE: Renames #working_at to #updated_at
• Major UI improvements with enhanced progress bars and better web interface styling
• Adds fallback routes for retry and delete buttons
• Adds a devcontainer to simplify development
• Improved elapsed time and ETA calculations