feat(workers): systemd unit + push-workers.sh

Deploy README extended with workers bootstrap + note on the void2-db
SQL_ASCII cluster requiring client_encoding=UTF8 on Python clients.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

deploy/push-workers.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Push Python void-workers source to CT 311 and restart the service.
+# Run from /project/src/void-v2.
+
+TARGET=${TARGET:-root@192.168.1.13}
+REMOTE_DIR=${REMOTE_DIR:-/opt/void-workers}
+
+rsync -avz --delete \
+  --exclude .venv \
+  --exclude __pycache__ \
+  --exclude '*.egg-info' \
+  --exclude tests \
+  workers/ "$TARGET:$REMOTE_DIR/"
+
+ssh "$TARGET" "
+  cd $REMOTE_DIR
+  if [ ! -d venv ]; then
+    python3.12 -m venv venv
+  fi
+  . venv/bin/activate
+  pip install --quiet --upgrade pip
+  pip install --quiet -e '.[all]'
+  systemctl restart void-workers
+"
+echo "Workers deployed."