fastrho high-ne-v1 — mosquito and dipteran specialist

Phased high-effective-population-size specialist used for the Anopheles atlas and dipteran analyses. The training regime extends to approximately Ne=2e6. Use input_mode="phased" and validate absolute-rate calibration on cohort-matched simulations. The release includes the exact paper checkpoint, matching statistics, and a deterministic checksummed bundle.