Document Training Part 1 upload and repository layout

README.md

@@ -34,7 +34,7 @@ configs:
 
 ## Files currently hosted in this repository
 
-This repository currently hosts the benchmark resource archive, global metadata, and five evaluation CSVs. The archive contains the full resource folder described below, including predictions and examples. Training and test archive names below describe the complete CryoAtlas v1.0 release; those large data archives have not yet been mirrored to this repository.
+This repository hosts the benchmark resource archive, global metadata, and five evaluation CSVs. **Training Part 1 is currently being uploaded to `train/part01/`**, comprising 17 independent archives and 4,164 entries. Its subset metadata is available under `metadata/train/part01/`, with checksums under `checksums/train/part01/`. Archives become available individually after verification. The other three training parts and the complete test archives have not yet been mirrored here. The resource archive contains the predictions and examples described below.
 
 - `resources/CryoAtlas_v1.0_benchmark_resources.tar.gz`: the complete benchmark resource package.
 - `Benchmark_outcome/`: individually accessible evaluation CSVs, configured as five Dataset Viewer subsets with 618 test targets each.