Display job duration for finished ones

[morgoth]

To help discover which jobs are fast/slow.

I tried to add a simple test:

module ActiveJob::QueueAdapters::AdapterTesting::JobDetails
  extend ActiveSupport::Testing::Declarative

  test "returns job duration" do
    DummyJob.perform_later
    perform_enqueued_jobs

    job = ActiveJob.jobs.last

    assert_job_proxy DummyJob, job
    assert job.job_id
  end
end

but this fails for both adapters with:

Error:
ActiveJob::QueueAdapters::ResqueTest#test_returns_job_duration:
NoMethodError: undefined method 'serialized_arguments' for nil
    test/active_job/queue_adapters/adapter_testing/job_details.rb:11:in 'block in <module:JobDetails>'

Error:
ActiveJob::QueueAdapters::SolidQueueTest#test_returns_job_duration:
ActiveJob::Errors::QueryError: Status not supported: 
    lib/active_job/queue_adapters/solid_queue_ext.rb:231:in 'ActiveJob::QueueAdapters::SolidQueueExt::SolidQueueJobs#execution_class_by_status'
    lib/active_job/queue_adapters/solid_queue_ext.rb:179:in 'ActiveJob::QueueAdapters::SolidQueueExt::SolidQueueJobs#executions'
    lib/active_job/queue_adapters/solid_queue_ext.rb:151:in 'ActiveJob::QueueAdapters::SolidQueueExt::SolidQueueJobs#jobs'
    lib/active_job/queue_adapters/solid_queue_ext.rb:51:in 'ActiveJob::QueueAdapters::SolidQueueExt#fetch_jobs'
    lib/active_job/jobs_relation.rb:256:in 'ActiveJob::JobsRelation#perform_each'
    lib/active_job/jobs_relation.rb:243:in 'ActiveJob::JobsRelation#load_jobs'
    lib/active_job/jobs_relation.rb:125:in 'ActiveJob::JobsRelation#each'
    lib/active_job/jobs_relation.rb:31:in 'Enumerable#to_a'
    lib/active_job/jobs_relation.rb:31:in 'ActiveJob::JobsRelation#last'
    test/active_job/queue_adapters/adapter_testing/job_details.rb:9:in 'block in <module:JobDetails>'

[morgoth]

Changed for consistency with Enqueued and Scheduled