Singularity Clock: moved 1076d closer (2026-04-15)

Methodology v1.4.0. Singularity projection moved earlier (2032-11-26 → 2029-12-16) after reweighting. METR task horizon (→1000hr, month-scale autonomous research) weight raised 0.20 → 0.35 as a leading indicator; AI-authored research share (→50%) weight lowered 0.50 → 0.35 because it is a lagging proxy (a linear fit to a pre-phase-transition variable is structurally conservative once capability crosses research-scale horizons). Metaculus+3yr heuristic unchanged at 0.30. Linear extrapolation retained for AI-authored share since it has no natural ceiling at low values. Net: more weight on the leading indicator, which produces the more compressed date.