Add shard_00069.manifest.json

bison-data-v1/shard_00069.manifest.json

@@ -0,0 +1,13 @@
+{
+  "shard_id": 69,
+  "rows": 162462,
+  "size_mb": 77.63,
+  "compression": "zstd",
+  "source_breakdown": {
+    "python_edu": 0.285,
+    "tiny_math": 0.334,
+    "arithmetic": 0.381
+  },
+  "created_at": "2026-06-24T16:18:19.625529Z",
+  "run_name": "bison-data-v1"
+}