Mask Ghostfolio data source

apps/api/src/helper/data-source.helper.ts

@@ -0,0 +1,13 @@
+import { DataSource } from '@prisma/client';
+
+export function getMaskedGhostfolioDataSource({
+  dataSource,
+  ghostfolioDataSources
+}: {
+  dataSource: DataSource;
+  ghostfolioDataSources: string[];
+}) {
+  return ghostfolioDataSources.includes(dataSource)
+    ? DataSource.GHOSTFOLIO
+    : dataSource;
+}