Move darkstorm_backend to just backend

Added MongoDB instances of DB tables
Updated some DB interfaces
Added logging to count cleanup

internal/backend/darkstorm_test.go

@@ -0,0 +1,23 @@
+package backend
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+func TestStuff(t *testing.T) {
+	for i := 0; i < 50; i++ {
+		go func() {
+			id, err := uuid.NewV7()
+			if err != nil {
+				fmt.Println(err)
+			}
+			fmt.Println(id.String())
+		}()
+	}
+	time.Sleep(3 * time.Second)
+	t.Fatal("end")
+}