feat: export PostgreSQL training dataset as JSON

src/dotnet/QuantEngine.Web/Program.cs

@@ -97,7 +97,9 @@ try
     builder.Services.AddScoped<IWorkspaceRepository, WorkspaceRepository>();
     builder.Services.AddScoped<IPostgresqlHistoryStore, PostgresqlHistoryStore>();
     builder.Services.AddScoped<INormalizedLearningStore, NormalizedLearningStore>();
+    builder.Services.AddScoped<ILearningDatasetReader, LearningDatasetReader>();
     builder.Services.AddScoped<DecisionLearningService>();
+    builder.Services.AddScoped<LearningDatasetService>();
     builder.Services.AddScoped<IPostgresqlHistorySnapshotReader, PostgresqlHistorySnapshotReader>();
     builder.Services.AddScoped<HistoryIngestionService>();
     builder.Services.AddScoped<ICollectionRepository, CollectionRepository>();