feat: add safe growth report persistence and AvalAI client

internal/growthreport/service_test.go

@@ -0,0 +1,23 @@
+package growthreport
+
+import (
+	"testing"
+	"time"
+)
+
+func TestRequestHashIsStableAndScopeSensitive(t *testing.T) {
+	t.Parallel()
+	a := RequestHash(7, "T-1", false)
+	if a != RequestHash(7, "T-1", false) { t.Fatal("RequestHash() is not stable") }
+	if a == RequestHash(7, "T-2", false) || a == RequestHash(7, "T-1", true) { t.Fatal("RequestHash() ignored request scope") }
+}
+
+func TestNextTehranRefreshUsesCalendarBoundary(t *testing.T) {
+	t.Parallel()
+	now := time.Date(2026, 8, 21, 20, 0, 0, 0, time.UTC)
+	next := NextTehranRefresh(now)
+	location, _ := time.LoadLocation("Asia/Tehran")
+	local := next.In(location)
+	if local.Hour() != 0 || local.Minute() != 0 || !next.After(now) { t.Fatalf("NextTehranRefresh() = %s", next) }
+}
+