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

internal/build/build.go

@@ -89,6 +89,7 @@ func generateMain(m Manifest) ([]byte, error) {
 	b.WriteString("\t\"git.golem15.com/golem15/summercms/modules/bonfire\"\n")
 	b.WriteString("\t\"git.golem15.com/golem15/summercms/modules/cabana\"\n")
 	b.WriteString("\t\"git.golem15.com/golem15/summercms/modules/compass\"\n")
+	b.WriteString("\t\"git.golem15.com/golem15/summercms/modules/conga\"\n")
 	b.WriteString("\t\"git.golem15.com/golem15/summercms/modules/lagoon\"\n")
 	b.WriteString("\t\"git.golem15.com/golem15/summercms/modules/pact\"\n")
 	b.WriteString("\t\"git.golem15.com/golem15/summercms/modules/party\"\n")
@@ -111,6 +112,7 @@ func generateMain(m Manifest) ([]byte, error) {
 	b.WriteString("\t\treturn err\n")
 	b.WriteString("\t}\n")
 	b.WriteString("\tcommands := lagoon.RuntimeCommands(app, plugins)\n")
+	b.WriteString("\tcommands = append(commands, conga.RuntimeCommands(app, plugins)...)\n")
 	b.WriteString("\tcommands = append(commands, surf.ServeCommand(app, plugins))\n")
 	b.WriteString("\tcommands = append(commands, surf.RouteListCommand(app, plugins))\n")
 	b.WriteString("\tcommands = append(commands, cabana.RuntimeCommands(app)...)\n")