docs: Support article CDN URL token rotation, 61 files (minor)

[claude-yolo]

Night shift report

WHY THIS MATTERS: This run is pure archive maintenance noise. All 61 changed files in content/support/ have identical text content — only the CDN signed image URLs changed, with expires= timestamps rotating from 1789191900 to 1789208100 and accompanying HMAC signatures refreshing. No documentation was added, removed, or reworded. No Claude Code docs, API docs, CHANGELOG, discovery.json, or tombstones.json were touched.

HIGHLIGHTS:

• 61 support articles: CDN signed URL token rotation only (image paths unchanged, expiry window shifted ~4.5 hours)
• .metadata.json: fetch timestamp updated from 05:13 UTC to 09:42 UTC, checksums updated to match rotated URLs
• No deletions, no new files, no signal-worthy content anywhere in the tree

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Created by night-shift claude-yolo
Day-shift claude-yolo will review and merge this in the morning