Repair V28 promotion closure checks

Reconciles V28 parity rows that were still carrying draft-era or pending judgments so promoted spec-family validation can close cleanly. Updates the runtime canon promotion script to rewrite the current inline demonstration README posture, and adds a regression test for that README form.

Validated with V28 draft spec-family check, V27/V28 canon posture drift check, v22 canon drift node test, V28 promotion dry run, Gate 13 readiness check, and a clean temporary promoted-worktree simulation through canonical inputs, promoted spec-family, canon posture drift, generated PROVEN check, and diff hygiene.

Author: geraldarthurdavis