Clean up redis dependencies #197
Description
We removed sidekiq in favor of solid queue some time ago, and we turned off the Heroku-hosted redis instance at that time. But we still have some code that references redis. We should remove all references to redis and ensure everything is working as expected without it.
In particular, it looks like ActionCable is still configured to look for a redis instance.
@childetx Thanks for bringing my attention to the app crashing.
Aug 17 21:13:15 edifyapp app/web.1 I, [2025-08-18T03:13:15.619095 #2] INFO -- : [ActionCable] [User 1] Registered connection (Z2lkOi8vZWRpZnkvVXNlci8x)
Aug 17 21:13:15 edifyapp app/web.1 #<Thread:0x00007f6763de2d40 /app/vendor/bundle/ruby/3.4.0/gems/actioncable-7.2.2.1/lib/action_cable/subscription_adapter/redis.rb:161 run> terminated with exception (report_on_exception is true):
Aug 17 21:13:15 edifyapp app/web.1 /app/vendor/ruby-3.4.5/lib/ruby/3.4.0/socket.rb:1639:in 'Socket#__connect_nonblock': Connection refused - connect(2) for 127.0.0.1:6379 (redis://localhost:6379/1) (Redis::CannotConnectError)
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/ruby-3.4.5/lib/ruby/3.4.0/socket.rb:1639:in 'Socket#connect_nonblock'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/ruby-3.4.5/lib/ruby/3.4.0/socket.rb:60:in 'Addrinfo#connect_internal'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/ruby-3.4.5/lib/ruby/3.4.0/socket.rb:141:in 'Addrinfo#connect'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/ruby-3.4.5/lib/ruby/3.4.0/socket.rb:753:in 'block in Socket.tcp_with_fast_fallback'
Aug 17 21:13:15 edifyapp app/web.1 from <internal:kernel>:168:in 'Kernel#loop'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/ruby-3.4.5/lib/ruby/3.4.0/socket.rb:721:in 'Socket.tcp_with_fast_fallback'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/ruby-3.4.5/lib/ruby/3.4.0/socket.rb:661:in 'Socket.tcp'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-client-0.25.1/lib/redis_client/ruby_connection.rb:120:in 'RedisClient::RubyConnection#connect'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-client-0.25.1/lib/redis_client/ruby_connection.rb:51:in 'RedisClient::RubyConnection#initialize'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-client-0.25.1/lib/redis_client.rb:773:in 'Class#new'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-client-0.25.1/lib/redis_client.rb:773:in 'block in RedisClient#connect'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-client-0.25.1/lib/redis_client/middlewares.rb:12:in 'RedisClient::BasicMiddleware#connect'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-client-0.25.1/lib/redis_client.rb:772:in 'RedisClient#connect'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-client-0.25.1/lib/redis_client.rb:759:in 'RedisClient#raw_connection'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-client-0.25.1/lib/redis_client.rb:719:in 'RedisClient#ensure_connected'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-5.4.1/lib/redis/client.rb:91:in 'Redis::Client#ensure_connected'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-client-0.25.1/lib/redis_client.rb:744:in 'RedisClient#ensure_connected'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-5.4.1/lib/redis/client.rb:91:in 'Redis::Client#ensure_connected'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-client-0.25.1/lib/redis_client.rb:443:in 'RedisClient#disable_reconnection'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/redis-5.4.1/lib/redis.rb:81:in 'Redis#without_reconnect'
Aug 17 21:13:15 edifyapp app/web.1 from /app/vendor/bundle/ruby/3.4.0/gems/actioncable-7.2.2.1/lib/action_cable/subscription_adapter/redis.rb:90:in 'ActionCable::SubscriptionAdapter::Redis::Listener#listen'