Await UpsertEntity in ApplyContentToEntityAsync

Await the UpsertEntity call so the upsert completes before SaveChangesAsync is invoked. This ensures the asynchronous operation finishes and avoids potential race conditions or missing data when saving changes.

Author: mrdevrobot

samples/EntglDb.Sample.Shared/SampleDocumentStore.cs

@@ -37,7 +37,7 @@ public SampleDocumentStore(
     protected override async Task ApplyContentToEntityAsync(
         string collection, string key, JsonElement content, CancellationToken cancellationToken)
     {
-        UpsertEntity(collection, key, content);
+        await UpsertEntity(collection, key, content);
         await _context.SaveChangesAsync(cancellationToken);
     }