Initial commit: BAF Lakehouse fraud detection pipeline

End-to-end LightGBM fraud detection pipeline built as an R package,
orchestrated by targets with data stored in MinIO via Apache Arrow.
Includes 6-layer Lakehouse architecture, class imbalance tournament,
formally tuned hyperparameters (PR-AUC 0.198), and Quarto RevealJS slides.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

R/baflakehouse-package.R

@@ -0,0 +1,9 @@
+#' baflakehouse: Lakehouse Workflow for the Bank Account Fraud Dataset
+#'
+#' Tools to ingest the Bank Account Fraud (BAF) Base dataset into a MinIO/S3-backed
+#' lakehouse, clean encoded missing values, and produce reproducible reporting
+#' artifacts orchestrated with targets.
+#'
+#' @docType _PACKAGE
+#' @name baflakehouse-package
+NULL