add endpoint

lib/src/app/data.dart

@@ -533,6 +533,36 @@ class DataClient {
     final response = await _datasetClient.listDatasetsByIDs(request);
     return response.datasets;
   }
+
+  /// Gets the most recent tabular data captured from the specified data source,
+  /// as long as it was synced within the last year.
+  ///
+  /// For more information, see [Data Client API](https://docs.viam.com/appendix/apis/data-client/).
+  Future<(DateTime, DateTime, Map<String, dynamic>)?> getLatestTabularData(
+    String partId,
+    String resourceName,
+    String resourceSubtype,
+    String methodName,
+  ) async {
+    final request = GetLatestTabularDataRequest()
+      ..partId = partId
+      ..resourceName = resourceName
+      ..resourceSubtype = resourceSubtype
+      ..methodName = methodName;
+
+    final response = await _dataClient.getLatestTabularData(request);
+
+    if (!response.hasPayload() || !response.hasTimeCaptured() || !response.hasTimeSynced()) {
+      return null;
+    }
+
+    return (
+      response.timeCaptured.toDateTime(),
+      response.timeSynced.toDateTime(),
+      response.payload.toStruct().toMap(),
+    );
+  }
+
 }
 
 /// {@category Viam SDK}

test/unit_test/app/data_client_test.dart

@@ -411,6 +411,47 @@ void main() {
       });
     });
   });
+
+  test('getLatestTabularData', () async {
+    final timeCaptured = DateTime(2023, 1, 1);
+    final timeSynced = DateTime(2023, 1, 2);
+    final payload = Struct()..fields.addAll({
+      'key': Value()..stringValue = 'value'
+    });
+
+    when(dataServiceClient.getLatestTabularData(any)).thenAnswer((_) => MockResponseFuture.value(
+      GetLatestTabularDataResponse()
+        ..timeCaptured = Timestamp.fromDateTime(timeCaptured)
+        ..timeSynced = Timestamp.fromDateTime(timeSynced)
+        ..payload = payload
+    ));
+
+    final response = await dataClient.getLatestTabularData(
+      'part-id',
+      'resource-name', 
+      'resource-subtype',
+      'method-name'
+    );
+
+    expect(response?.$1, equals(timeCaptured));
+    expect(response?.$2, equals(timeSynced));
+    expect(response?.$3, equals({'key': 'value'}));
+
+    verify(dataServiceClient.getLatestTabularData(any)).called(1);
+
+    // Test null response
+    when(dataServiceClient.getLatestTabularData(any)).thenAnswer((_) => 
+      MockResponseFuture.value(GetLatestTabularDataResponse()));
+
+    final nullResponse = await dataClient.getLatestTabularData(
+      'part-id',
+      'resource-name',
+      'resource-subtype', 
+      'method-name'
+    );
+
+    expect(nullResponse, isNull);
+  });
 
   group('Filter Utils Tests', () {
     test('setDateTimeCaptureInterval', () {