Add shard_00030.manifest.json

manifests/shard_00030.manifest.json

@@ -0,0 +1,14 @@
+{
+  "shard_id": 30,
+  "rows": 127870,
+  "size_mb": 210.94,
+  "compression": "zstd",
+  "source_breakdown": {
+    "fineweb_edu": 0.5969,
+    "cosmopedia_v2": 0.3,
+    "tiny_strange": 0.0979,
+    "mini_en": 0.0052
+  },
+  "created_at": "2026-06-27T09:44:31.600515Z",
+  "run_name": "bison-data-v2"
+}