feat: Update project structure and configuration files

backend/app/service/queue/error.go

@@ -0,0 +1,24 @@
+package queue
+
+import (
+	"context"
+
+	"github.com/riverqueue/river"
+	"github.com/riverqueue/river/rivertype"
+	log "github.com/sirupsen/logrus"
+)
+
+type CustomErrorHandler struct{}
+
+func (*CustomErrorHandler) HandleError(ctx context.Context, job *rivertype.JobRow, err error) *river.ErrorHandlerResult {
+	log.Infof("Job errored with: %s\n", err)
+	return nil
+}
+
+func (*CustomErrorHandler) HandlePanic(ctx context.Context, job *rivertype.JobRow, panicVal any, trace string) *river.ErrorHandlerResult {
+	log.Infof("Job panicked with: %v\n", panicVal)
+	log.Infof("Stack trace: %s\n", trace)
+	return &river.ErrorHandlerResult{
+		SetCancelled: true,
+	}
+}