Traffic counts what matters: rooms opened from the site, where links were shared, scanners and monitors as bots

- A room opened with Play now never loads /join: the API's answer to
  POST /api/rooms is counted as rooms opened here.
- Link previews (Slack, Discord, Facebook, iMessage, WhatsApp and the
  rest) are reported as where the link was shared, since the people who
  click them arrive with no referrer. WhatsApp's fetcher is a bot now.
- An address that asks for a scanner's paths, or keeps coming back
  without opening a game, is a bot's all day; so is a browser that loads
  pages at a steady interval from a new address each time, never
  playing. A declared bot is still judged request by request.
- The site's own addresses, sslip.io included, are not referrers.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jm2auWk6RP71CjaAb4FMoG

deploy/deploy.sh

@@ -25,7 +25,7 @@ rsync -az --delete --filter='P _app/immutable/*' \
 # it needs only its code and the engine. Ledgers live outside this tree.
 rsync -az --delete --exclude='/server/node_modules' \
   --include='/server/***' --include='/src/' --include='/src/lib/' --include='/src/lib/game/***' \
-  --include='/deploy/' --include='/deploy/waving-hands.service' --include='/deploy/waving-hands.cron' --include='/deploy/*.sh' --include='/deploy/hash-tokens.ts' \
+  --include='/deploy/' --include='/deploy/waving-hands.service' --include='/deploy/waving-hands.cron' --include='/deploy/*.sh' --include='/deploy/hash-tokens.ts' --include='/deploy/traffic.py' \
   --exclude='*' \
   ./ "root@$HOST:/opt/waving-hands/app/"
 
@@ -39,6 +39,7 @@ ssh "root@$HOST" '
   # Cron runs the rollup and the backup from /usr/local/bin: install them on
   # every deploy so the live copies are always the repo copies.
   install -m 755 /opt/waving-hands/app/deploy/visitors.sh /usr/local/bin/waving-hands-visitors.sh
+  install -m 644 -D /opt/waving-hands/app/deploy/traffic.py /usr/local/lib/waving-hands/traffic.py
   install -m 755 /opt/waving-hands/app/deploy/pulse.sh /usr/local/bin/waving-hands-pulse.sh
   install -m 755 /opt/waving-hands/app/deploy/waving-hands-rollup.sh /usr/local/bin/waving-hands-rollup.sh
   install -m 755 /opt/waving-hands/app/deploy/waving-hands-backup.sh /usr/local/bin/waving-hands-backup.sh