feat: add runnable casual matcher role

server/matcher/worker.go

@@ -34,6 +34,26 @@ type Worker struct {
 	Prepare  PrepareFunc
 }
 
+// Run polls until cancellation. A failed attempt is returned so a supervisor
+// can restart the role rather than silently dropping durable claim failures.
+func (w Worker) Run(ctx context.Context, interval time.Duration) error {
+	if interval <= 0 {
+		return fmt.Errorf("matcher interval must be positive")
+	}
+	for {
+		if _, err := w.RunOnce(ctx); err != nil {
+			return err
+		}
+		timer := time.NewTimer(interval)
+		select {
+		case <-ctx.Done():
+			timer.Stop()
+			return nil
+		case <-timer.C:
+		}
+	}
+}
+
 // RunOnce performs one bounded matchmaking attempt. The source may be Redis
 // backed, but the creator must be the durable transaction that claims tickets;
 // a stale cache therefore fails safely and can be retried on the next pass.