add nn exp

src/data_store.py

@@ -103,6 +103,7 @@ UQ_BUDGET_FILES: dict[str, list[tuple[str, str]]] = {
         ("ces-eki-dmc", "ces-eki-dmc_results/ces-eki-dmc_l96_nn_forcing_ensemble_results_2026-06-15_minimal.nc"),
         ("iekf", "gnki-uq_results/leaderboard_gnki_l96_flux-force_2026-07-07_minimal.nc"),
         ("ces-eki-const", "ces-eki-const_results/ces-eki-const_l96_nn_forcing_ensemble_results_2026-07-09_minimal.nc"),
+        ("ces-iekf-const", "ces-iekf-const_results/ces-iekf-const_l96_nn_forcing_ensemble_results_2026-07-17_minimal.nc"),
     ],
     "L96_SPATIAL_FORCING": [
         ("ces-eki-dmc", "ces-eki-dmc_results/ces-eki-dmc_l96_spatial_forcing_ensemble_results_2026-06-15_minimal.nc"),