feat(11-02): run plugin schedules as River periodic jobs through bonfire.Call

- pact.HasSchedule with ScheduledCommand and Daily/DailyAt/Every cadences (no River import)
- bonfire.Call, Catalog and ErrUnknownCommand for in-process command runs
- conga Daily/Every wall-clock schedules in app.timezone, periodic jobs on every worker,
  scheduled queue (MaxAttempts 1, unique by args within the cadence period)
- scheduled worker runs only entries matching the compiled table; unregistered
  commands are skipped with a Warn log
- generated app main publishes bonfire.NewCatalog(commands); hello main regenerated

modules/conga/conga.go

@@ -45,6 +45,11 @@ type Manager struct {
 	jobs     map[string]congaJob
 	inserter *river.Client[*sql.Tx]
 	worker   *river.Client[*sql.Tx]
+
+	// scheduledJob is the built-in scheduled command job; schedule is the
+	// compiled entry table of the running worker, keyed by entry id.
+	scheduledJob pact.Job
+	schedule     map[string]pact.ScheduledCommand
 }
 
 // From returns the app's Manager, publishing a new one on first use.