Upload data/dev/huggingface/data_metadata.json with huggingface_hub

data/dev/huggingface/data_metadata.json

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+{
+    "market_name": "CAC 40 (France)",
+    "last_update": "2026-05-07T15:24:32.545414",
+    "n_assets_tracked": 40,
+    "current_allocation": {
+        "CA.PA": 0.25,
+        "LR.PA": 0.25,
+        "PUB.PA": 0.02,
+        "STMPA.PA": 0.25,
+        "TEP.PA": 0.02,
+        "VIE.PA": 0.21
+    },
+    "hf_branch": "dev/huggingface"
+}