brainless 0.6.0

The nightly compile says what it did.

• Change brief. tools/wiki_changes.py snapshots .wiki/ before the 23:20 compile
  and diffs it after: pages added, updated and removed per kind, links gained, and new
  Contested or Superseded bullets on concept pages. No model. It writes
  _Agent-Context/WIKI-CHANGES.md, the morning briefing reads it, and a new contradiction
  becomes a quick action for the owner. --since <git ref> shows the change since any
  commit.
• A stuck compiler shows in health. The run log gets wiki_changed; seven nights in
  a row with no page changed turn HEALTH.md yellow. The dry-run check now counts only runs
  that report the field, so a field added later does not read older runs as zeros.
• Dialectic backstage. The persona rounds move to #dialectic-lab; the owner's
  #dialectic gets one short card per topic. The long context goes to a brief file the
  personas read, so moderator messages stay a few lines.
• Telegram receipt. Capture sends one "saved" line back to the whitelisted chat; still
  no commands or buttons. Buzz deliveries drop the hidden marker, which Buzz rendered
  verbatim.
• Leak scan. Common words that are also entity aliases no longer flag every file.