Aggiunge overlay server-side burn-in e stabilizza diretta live.

Tabellone, badge e brand sono ricodificati nel flusso _air via OverlayRelay;
sync punteggio HTTP, volume condiviso rails/sidekiq, qualità 720p migliorata
e badge CONNECTING in ripresa da pausa.

Co-authored-by: Cursor <cursoragent@cursor.com>

infra/scripts/install_production_cron.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+# Installa crontab replay su server produzione (utente corrente).
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+RUNNER="${ROOT}/scripts/cron/run_rails_task.sh"
+LOG_DIR="${MATCHLIVETV_LOG_DIR:-/opt/matchlivetv/log}"
+LOG_FILE="${LOG_DIR}/cron-replay.log"
+
+chmod +x "$RUNNER"
+mkdir -p "$LOG_DIR"
+
+MARKER="# matchlivetv-replay-cron"
+CRON_BLOCK="${MARKER}
+0 3 * * * ${RUNNER} recordings:purge_expired >> ${LOG_FILE} 2>&1
+0 8 * * * ${RUNNER} recordings:expiry_warnings >> ${LOG_FILE} 2>&1
+"
+
+existing="$(crontab -l 2>/dev/null || true)"
+if echo "$existing" | grep -q "$MARKER"; then
+  echo "Crontab replay già presente, aggiorno..."
+  echo "$existing" | awk -v block="$CRON_BLOCK" '
+    BEGIN { skip=0 }
+    /# matchlivetv-replay-cron/ { skip=1; next }
+    skip && /^[^#]/ && $0 !~ /^$/ { skip=0 }
+    skip { next }
+    { print }
+    END { print block }
+  ' | crontab -
+else
+  (echo "$existing"; echo "$CRON_BLOCK") | crontab -
+fi
+
+echo "Crontab installato:"
+crontab -l | grep -A3 "$MARKER"