Add Sidekiq payload decomression server middleware

Issue: https://gitlab.com/gitlab-com/gl-infra/scalability/-/issues/1054
Changelog: added

lib/gitlab/sidekiq_middleware.rb

@@ -9,6 +9,8 @@ module Gitlab
     # eg: `config.server_middleware(&Gitlab::SidekiqMiddleware.server_configurator)`
     def self.server_configurator(metrics: true, arguments_logger: true, memory_killer: true)
       lambda do |chain|
+        # Size limiter should be placed at the top
+        chain.add ::Gitlab::SidekiqMiddleware::SizeLimiter::Server
         chain.add ::Gitlab::SidekiqMiddleware::Monitor
         chain.add ::Gitlab::SidekiqMiddleware::ServerMetrics if metrics
         chain.add ::Gitlab::SidekiqMiddleware::ArgumentsLogger if arguments_logger

lib/gitlab/sidekiq_middleware/size_limiter/server.rb

+# frozen_string_literal: true
+
+module Gitlab
+  module SidekiqMiddleware
+    module SizeLimiter
+      class Server
+        def call(worker, job, queue)
+          ::Gitlab::SidekiqMiddleware::SizeLimiter::Compressor.decompress(job)
+
+          yield
+        end
+      end
+    end
+  end
+end

spec/lib/gitlab/sidekiq_middleware/size_limiter/server_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+# rubocop: disable RSpec/MultipleMemoizedHelpers
+RSpec.describe Gitlab::SidekiqMiddleware::SizeLimiter::Server, :clean_gitlab_redis_queues do
+  subject(:middleware) { described_class.new }
+
+  let(:worker) { Class.new }
+  let(:job) do
+    {
+      "class" => "ARandomWorker",
+      "queue" => "a_worker",
+      "args" => %w[Hello World],
+      "created_at" => 1234567890,
+      "enqueued_at" => 1234567890
+    }
+  end
+
+  before do
+    allow(::Gitlab::SidekiqMiddleware::SizeLimiter::Compressor).to receive(:compress)
+  end
+
+  it 'yields block' do
+    expect { |b| subject.call(worker, job, :test, &b) }.to yield_control.once
+  end
+
+  it 'calls the Compressor' do
+    expect(::Gitlab::SidekiqMiddleware::SizeLimiter::Compressor).to receive(:decompress).with(job)
+
+    subject.call(worker, job, :test) {}
+  end
+end