Add Redis gem explicitly, remove sidekiq require

Gemfile

@@ -19,8 +19,6 @@ gem "turbo-rails"
 gem "stimulus-rails"
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 gem 'jbuilder', '~> 2.7'
-# Use Redis adapter to run Action Cable in production
-# gem 'redis', '~> 4.0'
 # Use Active Model has_secure_password
 gem 'bcrypt', '~> 3.1'
 
@@ -65,6 +63,7 @@ gem 'discourse_api'
 gem "lnurl"
 gem 'manifique', '~> 1.1.0'
 gem 'nostr', '~> 0.6.0'
+gem "redis", "~> 5.4"
 
 group :development, :test do
   # Use sqlite3 as the database for Active Record