Update vector size

Author: BenjaminMichaelis

EssentialCSharp.Chat.Shared/Models/BookContentChunk.cs

@@ -45,10 +45,10 @@ public sealed class BookContentChunk
 
     /// <summary>
     /// Vector embedding for the chunk text - will be generated by embedding service
-    /// Using 1536 dimensions for Azure OpenAI text-embedding-3-small-v1
+    /// Using 3072 dimensions for Azure OpenAI text-embedding-3-large
     /// Use CosineSimilarity distance function since we are using text-embedding-3 (https://platform.openai.com/docs/guides/embeddings#which-distance-function-should-i-use)
     /// Postgres supports only Hnsw: https://learn.microsoft.com/en-us/semantic-kernel/concepts/vector-store-connectors/out-of-the-box-connectors/postgres-connector?pivots=programming-language-csharp&WT.mc_id=8B97120A00B57354
     /// </summary>
-    [VectorStoreVector(Dimensions: 1536, DistanceFunction = DistanceFunction.CosineSimilarity, IndexKind = IndexKind.Hnsw)]
+    [VectorStoreVector(Dimensions: 3072, DistanceFunction = DistanceFunction.CosineSimilarity, IndexKind = IndexKind.Hnsw)]
     public ReadOnlyMemory<float>? TextEmbedding { get; set; }
 }

EssentialCSharp.Web/appsettings.json

@@ -19,7 +19,7 @@
     "MaxMessagesPerWindow": 50
   },
   "AIOptions": {
-    "VectorGenerationDeploymentName": "text-embedding-ada-002",
+    "VectorGenerationDeploymentName": "text-embedding-3-large-v1",
     "ChatDeploymentName": "gpt-4o",
     "SystemPrompt": "You are a helpful AI assistant with expertise in C# programming and the Essential C# book content. You can help users understand C# concepts, answer programming questions, and provide guidance based on the Essential C# book materials. Be concise but thorough in your explanations.",
     "Endpoint": "",