Added mailboxes as local data sources (#1022)

app/MindWork AI Studio/Tools/Services/DataSourceEmbeddingFailure.cs

@@ -12,13 +12,14 @@ namespace AIStudio.Tools.Services;
 /// rejected API key, an unreachable provider, and a file nobody may read were one and the same
 /// list entry. The surrounding fields are what lets the UI offer the matching way out.
 /// </remarks>
-/// <param name="FilePath">The file that failed or the name of the data source when the failure was not about one file.</param>
+/// <param name="DocumentKey">The key of the document that failed, for a file its full path, or the name of the data source when the failure was not about one document.</param>
 /// <param name="Reason">What to tell the user about it, ready to show.</param>
 /// <param name="OccurredAtUtc">When it happened, so the list still makes sense when the user looks at it later.</param>
 /// <param name="FailureReason">What kind of failure it was. Everything that did not come from a provider stays at NONE.</param>
 /// <param name="StatusCode">What the provider answered, where it answered at all.</param>
 /// <param name="EmbeddingProviderName">The embedding provider that was asked.</param>
-/// <param name="ExtractionCode">Why reading the file failed, where the failure was about reading it at all.</param>
-/// <param name="IsPermanent">Whether the file stays out of the index until it changes.</param>
-public sealed record DataSourceEmbeddingFailure(string FilePath, string Reason, DateTimeOffset OccurredAtUtc, ProviderRequestFailureReason FailureReason = ProviderRequestFailureReason.NONE,
-    HttpStatusCode? StatusCode = null, string EmbeddingProviderName = "", FileExtractionErrorCode ExtractionCode = FileExtractionErrorCode.NONE, bool IsPermanent = false);
+/// <param name="ExtractionCode">Why reading the document failed, where the failure was about reading it at all.</param>
+/// <param name="IsPermanent">Whether the document stays out of the index until it changes.</param>
+/// <param name="DisplayName">How the document is called for the user, e.g. the name of a file or the subject of a mail. Empty where the run did not know it, e.g. for a failure stored by an earlier run.</param>
+public sealed record DataSourceEmbeddingFailure(string DocumentKey, string Reason, DateTimeOffset OccurredAtUtc, ProviderRequestFailureReason FailureReason = ProviderRequestFailureReason.NONE,
+    HttpStatusCode? StatusCode = null, string EmbeddingProviderName = "", FileExtractionErrorCode ExtractionCode = FileExtractionErrorCode.NONE, bool IsPermanent = false, string DisplayName = "");