Belief/Trade reorg: move legacy aux files into metadata

.gitattributes

@@ -68,3 +68,4 @@ Belief/benchmark_profile/state/train_rows.jsonl filter=lfs diff=lfs merge=lfs -t
 Belief/benchmark_profile/state/validation_rows.jsonl filter=lfs diff=lfs merge=lfs -text
 legacy/v1/v1_profilegen/state/train_rows.jsonl filter=lfs diff=lfs merge=lfs -text
 legacy/v1/v1_profilegen/state/validation_rows.jsonl filter=lfs diff=lfs merge=lfs -text
+Belief/metadata/profile_state_train_rows.jsonl filter=lfs diff=lfs merge=lfs -text

Belief/metadata/profile_state_train_rows.jsonl

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6aa14c3ee5352e1a6c0eb997865542e3eda0ce0963ee9ca5547dc01898479732
+size 369064606