Deploy Space: update README.md

README.md

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 Leaderboard for the **TSFM Realworld Benchmark** — evaluating time series foundation models on real-world multivariate forecasting tasks.
 
 Results are submitted via pull request to the [TSFM_Bench](https://github.com/zhouziyu02/TSFM_Bench) repository.
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+The leaderboard includes GIFT-Eval-style result slices aggregated by actual prediction
+length, domain, and frequency, normalized per configuration against Seasonal-Naive.
+The Overall tab additionally reports cumulative future-only MSE, RMSE, MAPE, quantile
+CRPS, and Real-Time Gain (RTG), together with temporal Stability, Kendall Improvement,
+Average Rank, pairwise Win Rate, and Elo.