feat(11-01): run job workers in serve and queue:work, add queue:clear

- Manager gains the apparatus JobManager surface: StartJob, UpdateJobState,
  UpdateMetadata, FailJob, CancelJob (is_canceled + STOPPED + River JobCancel),
  StopJob (STOPPED only), CheckIfCanceled and GetMetadata, all raw column
  writes so updated_at is untouched
- serve starts the in-process worker unless queue.work_in_serve is false and
  stops it on shutdown; an app without jobs gets an idle worker
- queue:work runs a foreground worker with repeatable --queue filters;
  queue:clear deletes available, scheduled and retryable jobs of one queue
- the generated main appends conga.RuntimeCommands; summer delegates
  queue:work and queue:clear; make:job scaffolds a conga.Job

cmd/summer/runtime.go

@@ -43,6 +43,26 @@ func delegateRollbackCommand() bonfire.Command {
 	}
 }
 
+func delegateQueueWorkCommand() bonfire.Command {
+	return bonfire.Command{
+		Name:        "queue:work",
+		Description: "Run background job workers in the app binary",
+		Flags: []bonfire.Flag{{
+			Name:        "queue",
+			Description: "Queue to work (repeatable; default all known queues)",
+			Repeatable:  true,
+		}},
+		Run: func(ctx context.Context, in bonfire.Input, out bonfire.Output) error {
+			argv := []string{"queue:work"}
+			for _, q := range in.Flags("queue") {
+				argv = append(argv, "--queue", q)
+			}
+			argv = append(argv, in.Args()...)
+			return runAppBinary(ctx, argv, out)
+		},
+	}
+}
+
 func runAppBinary(ctx context.Context, argv []string, out bonfire.Output) error {
 	if len(argv) == 0 {
 		return fmt.Errorf("summer: missing app command")