fix pod; set status defaults; stub runner mixin

lib/App/Netdisco/Worker/Status.pm

@@ -10,14 +10,19 @@ foreach my $slot (qw/
       done
       error
       defer
-      message
     /) {
 
   has $slot => (
     is => 'rw',
+    default => 0,
   );
 }
 
+has 'log' => (
+  is => 'rw',
+  default => '',
+);
+
 =head1 METHODS
 
 =head2 ok
@@ -53,7 +58,7 @@ sub status {
 
 =head2 update_job
 
-Updates an L<App::Netdisco::Backend::Job> with status and message.
+Updates an L<App::Netdisco::Backend::Job> with status and log.
 
 =cut
 
@@ -61,7 +66,7 @@ sub update_job {
   my $self = shift;
   my $job = shift or return;
   $job->status( $self->status );
-  $job->log( $self->message );
+  $job->log( $self->log );
 }
 
 1;