Add forecast engine config

engine_config.json

@@ -0,0 +1,53 @@
+{
+ "engine": "Darwin-Prediction-Weather",
+ "version": "1.0",
+ "grid": "240x121 (1.5 deg)",
+ "lead_days": [
+  1,
+  3,
+  5,
+  7,
+  10
+ ],
+ "inputs": [
+  "GenCast ensemble mean",
+  "IFS ENS mean",
+  "GraphCast",
+  "Pangu-Weather",
+  "FuXi",
+  "IFS HRES"
+ ],
+ "strategy_selected_on": "2018",
+ "evaluated_on": "2020",
+ "strategy_table": {
+  "2m_temperature": {
+   "1": "bias30_blend",
+   "3": "bias30_blend",
+   "5": "bias90_blend",
+   "7": "bias90_blend",
+   "10": "nobias_shrink"
+  },
+  "geopotential@500": {
+   "1": "bias30_blend",
+   "3": "nobias_blend",
+   "5": "nobias_blend",
+   "7": "nobias_blend",
+   "10": "nobias_shrink"
+  },
+  "temperature@850": {
+   "1": "nobias_shrink",
+   "3": "nobias_shrink",
+   "5": "nobias_blend",
+   "7": "nobias_blend",
+   "10": "nobias_shrink"
+  }
+ },
+ "strategies": {
+  "bias30_blend": "30-day gridpoint bias correction + inverse-MSE fusion",
+  "bias90_blend": "90-day gridpoint bias correction + inverse-MSE fusion",
+  "nobias_blend": "inverse-MSE fusion (30-day window)",
+  "nobias_shrink": "inverse-MSE fusion shrunk 50% toward the best single input",
+  "best_single": "best single input"
+ },
+ "language_core": "FINAL-Bench/Darwin-27B-ZTC-v9"
+}