fix: update test files to work with the new features

internal/provider/hetzner/hetzner_api_test.go

@@ -30,7 +30,8 @@ func TestUpdateRecordFullAPILifecycle(t *testing.T) {
 		case r.Method == http.MethodGet && r.URL.Path == "/records":
 			// Query records by zone_id
 			resp := map[string]interface{}{
-				"records": []map[string]string{{"id": recID, "name": domain, "value": "0.0.0.0", "type": "A"}},
+				// Return the relative subdomain name ("test") as the API does, not the full domain
+				"records": []map[string]string{{"id": recID, "name": "test", "value": "0.0.0.0", "type": "A"}},
 			}
 			json.NewEncoder(w).Encode(resp)
 		case r.Method == http.MethodPut && r.URL.Path == "/records/"+recID: