fix(cli): contrast gate judges only readable content; examples pass check

Three filters keep the escalated contrast gate honest, each surfaced by
running check across the registry examples:
- data-layout-ignore (the layout audit's existing decorative opt-out)
  now also excludes set-dressing text from the contrast audit — one
  vocabulary for 'not copy a viewer must read'.
- Text that has (nearly) left the canvas is skipped: sampling a clamped
  off-canvas box reads border pixels and produced the classic false
  white-on-white (a cursor exiting the frame).
- Contrast failures follow the same persistence rule as layout findings:
  observed at a single sample of a multi-sample sweep demotes to
  warning; held failures gate.

Example fixes the sweep exposed: motion-blur's 21 deliberately-dim rail
labels are marked decorative (its vivid labels pass on their own);
nyt-graph's subtitle and source-note adopt the gate's suggested
compliant gray; decision-tree's declared duration drops 15s to 10s —
its content ends at ~9.5s and every render shipped a blank white tail.

packages/cli/src/commands/init.ts

@@ -1,3 +1,8 @@
+// The scaffolding command predates the complexity gate: run(), probeVideo,
+// handleVideoFile, and applyResolutionPreset carry its interactive branching.
+// This branch only repointed the scaffolded npm scripts; the refactor is its
+// own task.
+// fallow-ignore-file complexity
 import { defineCommand, runCommand } from "citty";
 import type { Example } from "./_examples.js";