Add motrpac metadata

motrpac_metadata.json

@@ -0,0 +1,18 @@
+{
+  "dataset_name": "motrpac",
+  "download_urls": {
+    "proteomics": "https://d1yw74buhe0ts0.cloudfront.net/static/motrpac-data-hub/publications/data/related-studies/heritage-proteomics/HERITAGE_proteomics_somalogic.xlsx",
+    "analytes": "https://d1yw74buhe0ts0.cloudfront.net/static/motrpac-data-hub/publications/data/related-studies/heritage-proteomics/HERITAGE_somalogic_analytes.xlsx"
+  },
+  "download_timestamp": "2025-07-09 15:57:10.239336",
+  "statistics": {
+    "num_samples": 654,
+    "num_features": 4977,
+    "target_stats": {
+      "mean": 383.32874617736996,
+      "std": 202.6667738495557,
+      "min": -113.8,
+      "max": 1097.0
+    }
+  }
+}