Log full job details rather than just job_id

A partial revert of c43eb24 which didn't include any reasoning/justification for the log simplification.

It's useful to be able to log details of the job, particularly the job_class and arguments; if this additional detail isn't desired then it can be removed by using a custom `Que.log_formatter`, for example:

```ruby
Que.log_formatter = proc do |data|
  if (job = data.delete(:job))
    data[:job_id] = job[:id]
  end

  JSON.dump(data)
end
```

docs/README.md

@@ -349,7 +349,7 @@ que --worker-count 1
 By default, Que logs important information in JSON to either Rails' logger (when running in a Rails web process) or STDOUT (when running via the `que` executable). So, your logs will look something like:
 
 ```
-I, [2017-08-12T05:07:31.094201 #4687]  INFO -- : {"lib":"que","hostname":"lovelace","pid":21626,"thread":21471100,"event":"job_worked","job_id":6157665,"elapsed":0.531411}
+I, [2017-08-12T05:07:31.094201 #4687]  INFO -- : {"lib":"que","hostname":"lovelace","pid":98240,"thread":42660,"event":"job_worked","job":{"priority":1,"run_at":"2024-07-24T11:07:10.056514Z","id":2869885284504751564,"job_class":"WorkerJob","error_count":0,"last_error_message":null,"queue":"default","last_error_backtrace":null,"finished_at":null,"expired_at":null,"args":[1],"data":{},"job_schema_version":2,"kwargs":{}},"elapsed":0.001356}
 ```
 
 Of course you can have it log wherever you like:

lib/que/worker.rb

@@ -114,7 +114,7 @@ def work_job(metajob)
       if VALID_LOG_LEVELS.include?(log_level)
         log_message = {
           level: log_level,
-          job_id: metajob.id,
+          job: metajob.job,
           elapsed: elapsed,
         }
 
@@ -133,7 +133,7 @@ def work_job(metajob)
       Que.log(
         level: :debug,
         event: :job_errored,
-        job_id: metajob.id,
+        job: metajob.job,
         error: {
           class:   error.class.to_s,
           message: error.message,

spec/que/worker_spec.rb

@@ -74,7 +74,8 @@ def finished_job_ids
 
     events = logged_messages.select{|m| m[:event] == 'job_worked'}
     assert_equal 3, events.count
-    assert_equal job_ids, events.map{|m| m[:job_id]}
+    assert_equal [1, 2, 3], events.map{|m| m.dig(:job, :priority) }
+    assert_equal job_ids, events.map{|m| m.dig(:job, :id) }
   end
 
   it "should handle namespaced job subclasses" do
@@ -228,7 +229,7 @@ def assert_retry_cadence(
 
       # Error should be logged.
       event = events.first
-      assert_equal job_ids.first, event[:job_id]
+      assert_equal job_ids.first, event.dig(:job, :id)
       assert_equal "RuntimeError: Error!", event[:error]
 
       # Errored job should still be in the DB.