Clean up: keep only best model (53.10% accuracy)

🧹 清理内容:
- 删除所有实验模型（保留 dlinear_classification_2026）
- 删除所有测试和分析脚本
- 删除所有实验训练脚本

✅ 保留文件:
- models/checkpoints/dlinear_classification_2026/ (最佳模型)
- train_classification_full.py (训练脚本)
- test_2026_classification.py (测试脚本)
- data/, models/, training/ (核心代码)
- README.md, requirements.txt

📦 删除文件统计:
- 9个实验模型目录
- 21个测试/分析/实验脚本

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

models/checkpoints/cross_asset_btc_to_eth/test_metrics.json

@@ -1,13 +0,0 @@
-{
-  "mse": 5.495949517353438e-05,
-  "rmse": 0.007413467149285439,
-  "mae": 0.004826944321393967,
-  "mape": 930.6216430664062,
-  "directional_accuracy": 0.4907678594167834,
-  "backtest_total_return": -0.9745769500732422,
-  "backtest_final_capital": 254.23023986816406,
-  "backtest_sharpe_ratio": -0.26884937315369317,
-  "backtest_max_drawdown": -0.978744387626648,
-  "backtest_win_rate": 0.47166687889978354,
-  "backtest_num_trades": 3251
-}

models/checkpoints/dlinear_811_split/test_metrics.json

@@ -1,10 +0,0 @@
-{
-  "price_mae": 4283.3626861511675,
-  "price_rmse": 4735.107859758518,
-  "price_mape": 3.928560493143656,
-  "direction_accuracy": 0.49637127578304047,
-  "true_positives": 258,
-  "true_negatives": 2341,
-  "false_positives": 255,
-  "false_negatives": 2382
-}

models/checkpoints/dlinear_btc_1h_forecast/test_metrics.json

@@ -1,18 +0,0 @@
-{
-  "accuracy": 0.5,
-  "precision": 0.0,
-  "recall": 0.0,
-  "f1": 0.0,
-  "true_negatives": 642,
-  "false_positives": 0,
-  "false_negatives": 642,
-  "true_positives": 0,
-  "specificity": 1.0,
-  "mean_confidence": 0.0068817585706710815,
-  "backtest_total_return": -1.0,
-  "backtest_final_capital": 0.0,
-  "backtest_sharpe_ratio": -9.643650760992955,
-  "backtest_max_drawdown": NaN,
-  "backtest_win_rate": 0.0,
-  "backtest_num_trades": 0
-}

models/checkpoints/dlinear_btc_1h_forecast/test_metrics_fixed.json

@@ -1,18 +0,0 @@
-{
-  "accuracy": 0.5070093457943925,
-  "precision": 0.5053254437869823,
-  "recall": 0.6651090342679128,
-  "f1": 0.574310692669805,
-  "true_negatives": 224,
-  "false_positives": 418,
-  "false_negatives": 215,
-  "true_positives": 427,
-  "specificity": 0.34890965732087226,
-  "mean_confidence": 0.5017203688621521,
-  "backtest_total_return": -1.0,
-  "backtest_final_capital": -0.0,
-  "backtest_sharpe_ratio": 2.314261942010565,
-  "backtest_max_drawdown": -1.0,
-  "backtest_win_rate": 0.3325545171339564,
-  "backtest_num_trades": 136
-}

models/checkpoints/dlinear_btc_2020_2025/test_metrics.json

@@ -1,18 +0,0 @@
-{
-  "accuracy": 0.49764421240290335,
-  "precision": 0.502192108409725,
-  "recall": 0.3185035389282103,
-  "f1": 0.38979118329466356,
-  "true_negatives": 2648,
-  "false_positives": 1249,
-  "false_negatives": 2696,
-  "true_positives": 1260,
-  "specificity": 0.6794970490120605,
-  "mean_confidence": 0.49758902192115784,
-  "backtest_total_return": -1.0,
-  "backtest_final_capital": -0.0,
-  "backtest_sharpe_ratio": -2.5728736046923655,
-  "backtest_max_drawdown": NaN,
-  "backtest_win_rate": 0.16044823634279892,
-  "backtest_num_trades": 782
-}

models/checkpoints/dlinear_btc_full_data/final_metrics.json

@@ -1,13 +0,0 @@
-{
-  "mse": 2.142045195796527e-05,
-  "rmse": 0.004628223412710893,
-  "mae": 0.0030602782499045134,
-  "mape": 131.8273162841797,
-  "directional_accuracy": 0.49732620320855614,
-  "backtest_total_return": 0.2429506778717041,
-  "backtest_final_capital": 12429.5068359375,
-  "backtest_sharpe_ratio": 0.19540257211386183,
-  "backtest_max_drawdown": -0.13858233392238617,
-  "backtest_win_rate": 0.49732620320855614,
-  "backtest_num_trades": 0
-}

models/checkpoints/dlinear_btc_regression/test_metrics.json

@@ -1,13 +0,0 @@
-{
-  "mse": 2.382730417593848e-05,
-  "rmse": 0.004881321970116137,
-  "mae": 0.0033776722848415375,
-  "mape": 780.3690185546875,
-  "directional_accuracy": 0.5066853431809499,
-  "backtest_total_return": -0.1671363264322281,
-  "backtest_final_capital": 8328.63671875,
-  "backtest_sharpe_ratio": -0.0266775386419239,
-  "backtest_max_drawdown": -0.40377509593963623,
-  "backtest_win_rate": 0.48974914045587675,
-  "backtest_num_trades": 1061
-}

models/checkpoints/dlinear_predict_price/metrics.json

@@ -1,6 +0,0 @@
-{
-  "price_mae": 528.017854278076,
-  "price_rmse": 736.6082253699151,
-  "price_mape": 0.523728600511905,
-  "direction_accuracy": 0.5022918258212375
-}

models/checkpoints/dlinear_simple_features/metrics.json

@@ -1,13 +0,0 @@
-{
-  "mse": 2.1433252186398022e-05,
-  "rmse": 0.004629606050885758,
-  "mae": 0.00306295626796782,
-  "mape": 180.17770385742188,
-  "directional_accuracy": 0.4992360580595875,
-  "backtest_total_return": 0.226644828915596,
-  "backtest_final_capital": 12266.4482421875,
-  "backtest_sharpe_ratio": 0.18486101832170032,
-  "backtest_max_drawdown": -0.13858233392238617,
-  "backtest_win_rate": 0.4977081741787624,
-  "backtest_num_trades": 38
-}