Autoresearch-goal — removed

$autoresearch-goal was removed in OMX 0.21; use $autoresearch instead.

Autoresearch-goal was a duplicate research-over-goal-mode entry point. $autoresearch is the single canonical validator-gated research loop; it owns the research mission lifecycle that autoresearch-goal duplicated.

Migration: replace $autoresearch-goal with $autoresearch.

Task: {{ARGUMENTS}}