Remove top-level v1/v2 after moving to legacy/

v2/README_v2_release.md

@@ -1,58 +0,0 @@
-# V2 Release (Trading-Level, refreshed)
-
-This V2 release is organized into three subfolders under `v2/`:
-
-- `v2/source/` — source parquet tables
-- `v2/splits/` — structured train/validation/test splits (parquet)
-- `v2/benchmark_directgen/` — DirectGen benchmark (jsonl.gz)
-
-## 1) Source tables (`v2/source`)
-
-- `behavior_fixcost.parquet`
-- `trade_price_matched.parquet`
-- `market_semantic.parquet`
-- `source_metadata.json`
-
-## 2) Dataset splits (`v2/splits`)
-
-Files:
-- `train.parquet`
-- `validation.parquet`
-- `test.parquet`
-- `split_metadata.json`
-- `wallet_ids_experiment_2000.txt`
-
-Current split policy:
-- Fixed wallet universe: 2000 wallets
-- Per-wallet temporal split, then global merge
-- Current ratio: **85/10/5**
-- `validation/test` enforce **prior_same_market_trades >= 1** on final retained rows
-
-Current row counts:
-- train: **1,311,941**
-- validation: **114,471**
-- test: **59,560**
-
-## 3) DirectGen benchmark (`v2/benchmark_directgen`)
-
-Files:
-- `train.jsonl.gz`
-- `validation.jsonl.gz`
-- `test.jsonl.gz`
-- `benchmark_metadata.json`
-
-Current generation policy:
-- History organized as market blocks (`HistoryJSON`)
-- Other-market context: top-5 most recently active markets
-- Strict causality (`history < current sample time`)
-- History amount field: `amount_usdc`
-- Target amount field: `amount_usdc_est`
-- History action labels unified to target direction vocabulary:
-  - `increase`, `decrease`, `close`
-
-Current row counts:
-- train: **1,311,941**
-- validation: **114,471**
-- test: **59,559**
-
-> Note: benchmark test can be 1 row fewer than split test due to strict empty-history filtering during benchmark generation.