Added a way to read what the AI received from your sources (#1100)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Tools/Databases/IndexStore/EmbeddingStateChunk.cs

@@ -1,3 +1,41 @@
 namespace AIStudio.Tools.Databases.IndexStore;
 
-public sealed record EmbeddingStateChunk(string ChunkId, string ParentFileId, int? PageNumber, int ChunkIndex, string ChunkText, DateTimeOffset EmbeddedAtUtc);
+/// <summary>
+/// One chunk as the index stores it.
+/// </summary>
+/// <remarks>
+/// Where a chunk is goes into the typed columns its document has: pages, sheet and rows, or lines.
+/// The vector store keeps only the pages, cf. VectorStoragePoint: a search completes its hits from
+/// here by their chunk id.
+/// </remarks>
+/// <param name="ChunkId">The id of the chunk, which is the id of its point in the vector store.</param>
+/// <param name="ParentFileId">The document the chunk belongs to.</param>
+/// <param name="PageNumber">The page the chunk starts on, or null.</param>
+/// <param name="EndPageNumber">The page the chunk ends on, or null.</param>
+/// <param name="ChunkIndex">The place of the chunk in its document, counted from zero.</param>
+/// <param name="ChunkText">The text which was embedded.</param>
+/// <param name="EmbeddedAtUtc">When the chunk was stored.</param>
+/// <param name="TextHash">The hash of the text, cf. ChunkTextHash.</param>
+/// <param name="Generation">Which indexing of the document wrote the chunk.</param>
+/// <param name="SheetName">The sheet the chunk is from, or null. A chunk never runs from one sheet into the next.</param>
+/// <param name="StartRow">The row of its sheet the chunk starts at, or null.</param>
+/// <param name="EndRow">The row of its sheet the chunk ends at, or null.</param>
+/// <param name="StartLine">The line the chunk starts at, or null.</param>
+/// <param name="EndLine">The line the chunk ends at, or null.</param>
+/// <param name="AttachmentPosition">Which attachment of a mail the chunk is from, as mail_parts numbers it, or null for anything else.</param>
+public sealed record EmbeddingStateChunk(
+    string ChunkId,
+    string ParentFileId,
+    int? PageNumber,
+    int? EndPageNumber,
+    int ChunkIndex,
+    string ChunkText,
+    DateTimeOffset EmbeddedAtUtc,
+    string? TextHash = null,
+    int Generation = 0,
+    string? SheetName = null,
+    int? StartRow = null,
+    int? EndRow = null,
+    int? StartLine = null,
+    int? EndLine = null,
+    int? AttachmentPosition = null);