Update leaderboard_compute.py

Add Track 1 (Outcome Prediction) tab

Add Track 1 (Outcome Prediction) tab

Add Fallback rate column (from meta.json) second-from-right to both tables

Link LSM-2 (7-day) row to openmhc-lsm2-weekly (dense) checkpoint

Link forecasting model checkpoints (chronos2/toto fine-tuned + dlinear/mixlinear/segrnn)

Add Track 3 (forecasting) leaderboard section: live skill/rank/fair-skill vs seasonal_naive; pin openmhc@991caf5

Link methods to their HF model pages; add Models pill

Compute real MAPD fair-skill live; bump openmhc pin to main@bd5a102

Imputation sub-tracks (single-day/long-context) + paper types + type filters

Read method name/type/submitter from dataset sidecars; add Submitter column

Replace JSON API with self-rendering imputation leaderboard (computed live from substrate)