Revisits the lifecycle decision on the evidence of ADR-011 (a real draft
with open questions). Adds a fourth state, Proposed (YYYY-MM-DD), to ADR-023,
the template, the adr-structure check (+test), spec and plan. Sets ADR-011's
Status to Proposed and removes its now-redundant inline 'Proposed' line.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
