FEATURE: Optional detailed performance logging for Sidekiq jobs (#7091)

By default, this does nothing. Two environment variables are available:

- `DISCOURSE_LOG_SIDEKIQ`

  Set to `"1"` to enable logging. This will log all completed jobs to `log/rails/sidekiq.log`, along with various db/redis/network statistics. This is useful to track down poorly performing jobs.

- `DISCOURSE_LOG_SIDEKIQ_INTERVAL`

  (seconds) Check running jobs periodically, and log their current duration. They will appear in the logs with `status:pending`. This is useful to track down jobs which take a long time, then crash sidekiq before completing.

lib/middleware/request_tracker.rb

@@ -15,26 +15,7 @@ class Middleware::RequestTracker
   #   # do stuff with env and data
   # end
   def self.register_detailed_request_logger(callback)
-
-    unless @patched_instrumentation
-      MethodProfiler.patch(PG::Connection, [
-        :exec, :async_exec, :exec_prepared, :send_query_prepared, :query, :exec_params
-      ], :sql)
-
-      MethodProfiler.patch(Redis::Client, [
-        :call, :call_pipeline
-      ], :redis)
-
-      MethodProfiler.patch(Net::HTTP, [
-        :request
-      ], :net, no_recurse: true)
-
-      MethodProfiler.patch(Excon::Connection, [
-        :request
-      ], :net)
-      @patched_instrumentation = true
-    end
-
+    MethodProfiler.ensure_discourse_instrumentation!
     (@@detailed_request_loggers ||= []) << callback
   end