chore: Set rack-timeout to log at ERROR level (#10400)

40 % of Chatwoot's current log volume is from state transition logs generated by `rack-timeout`, which are logged at the `INFO` level. This PR reduce the noise in logs and set RACK::TIMEOUT to log at `error` level

config/initializers/rack_timeout.rb

@@ -0,0 +1,6 @@
+require 'rack-timeout'
+
+# Reduce noise by filtering state=ready and state=completed which are logged at INFO level
+Rails.application.config.after_initialize do
+  Rack::Timeout::Logger.level = Logger::ERROR
+end