Added local RAG (#756)

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

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

@@ -0,0 +1,16 @@
+namespace AIStudio.Tools.Databases.IndexStore;
+
+public sealed record EmbeddingStateFile(
+    string ParentFileId,
+    string AbsolutePath,
+    string FileName,
+    string RelativePath,
+    string FileType,
+    string Fingerprint,
+    long FileSize,
+    DateTimeOffset CreationUtc,
+    DateTimeOffset LastWriteUtc,
+    DateTimeOffset EmbeddedAtUtc,
+    int ChunkCount,
+    string ConfidenceLevel,
+    int ConfidenceLevelRank);