add Sidekiq monitoring for Datadog and Honeybadger (#5270)

config/initializers/datadog_apm.rb

@@ -7,6 +7,7 @@ Datadog.configure do |c|
   c.tracer partial_flush: true
   c.tracer priority_sampling: true
   c.use :delayed_job
+  c.use :sidekiq
   c.use :redis
   c.use :rails
   c.use :http

config/initializers/honeybadger.rb

@@ -11,6 +11,7 @@ Honeybadger.configure do |config|
   ]
   config.request.filter_keys += %w[authorization]
   config.delayed_job.attempt_threshold = 10
+  config.sidekiq.attempt_threshold = 10
 
   config.before_notify do |notice|
     notice.fingerprint = if notice.error_message&.include?("SIGTERM") && notice.component&.include?("fetch_all_rss")