test: Add initial test case for Recur service with memory and logger

sync/service/recur_test.go

@@ -1 +1,14 @@
-package main_test
+package main
+
+import (
+	"log/slog"
+	"testing"
+	"time"
+)
+
+func TestRecur(t *testing.T) {
+	t.Parallel()
+
+	mem := NewMemory()
+	rec := NewRecur(mem, mem, time.Second, slog.New())
+}