Update layout docs for assets/ restructure

README.md

@@ -132,15 +132,16 @@ for sample in ds:
 
 ```
 amazon/ConfBench/
-└── {doc_id}/
-    ├── original.pdf              # Original clean PDF
-    ├── gt.json                   # Ground truth annotations
-    ├── metadata.json             # Pipeline manifest
-    ├── default/
-    │   └── default_noisy.pdf
-    ├── archetype3/
-    │   └── archetype3_noisy.pdf
-    └── ... (16 more pipelines)
+└── assets/
+    └── {doc_id}/
+        ├── original.pdf              # Original clean PDF
+        ├── gt.json                   # Ground truth annotations
+        ├── metadata.json             # Pipeline manifest
+        ├── default/
+        │   └── default_noisy.pdf
+        ├── archetype3/
+        │   └── archetype3_noisy.pdf
+        └── ... (16 more pipelines)
 ```
 
 ### Ground Truth Schema (`gt.json`)
@@ -252,16 +253,17 @@ import json
 from pathlib import Path
 
 local_dir = Path(snapshot_download(repo_id="amazon/ConfBench", repo_type="dataset"))
+assets_dir = local_dir / "assets"
 
-doc_ids = [p.name for p in local_dir.iterdir() if p.is_dir()]
+doc_ids = [p.name for p in assets_dir.iterdir() if p.is_dir()]
 
 # Load ground truth for a single document
 def load_gt(doc_id):
-    return json.loads((local_dir / doc_id / "gt.json").read_text())
+    return json.loads((assets_dir / doc_id / "gt.json").read_text())
 
 # List noisy PDFs for a document
 def list_pipelines(doc_id):
-    meta = json.loads((local_dir / doc_id / "metadata.json").read_text())
+    meta = json.loads((assets_dir / doc_id / "metadata.json").read_text())
     return meta["pipelines"]
 ```