Changing fallback for content type to text/plain

Author: afprtclr

src/ServiceControl.Audit.Persistence.RavenDB/UnitOfWork/RavenAuditIngestionUnitOfWork.cs

@@ -35,7 +35,7 @@ public async Task RecordProcessedMessage(ProcessedMessage processedMessage, Read
             if (!body.IsEmpty)
             {
                 await using var stream = new ReadOnlyStream(body);
-                var contentType = processedMessage.Headers.GetValueOrDefault(Headers.ContentType, "text/xml");
+                var contentType = processedMessage.Headers.GetValueOrDefault(Headers.ContentType, "text/plain");
 
                 await bodyStorage.Store(processedMessage.Id, contentType, body.Length, stream, cancellationToken);
             }

src/ServiceControl.Audit.Persistence.Tests/AuditTests.cs

@@ -80,7 +80,7 @@ await IngestProcessedMessagesAudits(
         [Test]
         public async Task Can_roundtrip_message_body()
         {
-            string expectedContentType = "text/xml";
+            string expectedContentType = "text/plain";
             var unitOfWork = await StartAuditUnitOfWork(1);
 
             var body = new byte[100];