feat(ai-customer-service): add gate readiness verification and handoff docs

internal/http/handlers/audit_helper_test.go

@@ -0,0 +1,15 @@
+package handlers
+
+import (
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+func TestNewAuditID_ReturnsValidUUID(t *testing.T) {
+	id := newAuditID("audit", time.Now())
+	if _, err := uuid.Parse(id); err != nil {
+		t.Fatalf("newAuditID() = %q, want valid UUID: %v", id, err)
+	}
+}