Belief/Trade reorg: add unified metadata folder for Trade

Trade/metadata/benchmark_profile_metadata.json

@@ -0,0 +1,21 @@
+{
+  "version": "profilegen_v2_wallet_once_gpt54_pluscurmkt",
+  "description": "ProfileGen built from DirectGen v2: one wallet profile per wallet (gpt-5.4) + current market history in prompt.",
+  "source_directgen": "v2_outputs/directgen_v2_fixcost_marketblocks_top5_v4_unified_actions_ratio85105_prior1",
+  "files": {
+    "test": "v2/benchmark_profilegen/test.jsonl.gz",
+    "validation": "v2/benchmark_profilegen/validation.jsonl.gz",
+    "profiles_test": "v2/benchmark_profilegen/profiles_test.jsonl",
+    "profiles_validation": "v2/benchmark_profilegen/profiles_validation.jsonl"
+  },
+  "rows": {
+    "test": 59559,
+    "validation": 114471
+  },
+  "profile_generator_model": "gpt-5.4",
+  "prompt_components": [
+    "WalletProfile",
+    "CurrentMarketHistory",
+    "Current decision context"
+  ]
+}