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>

scripts/test/live_e2e_cycle.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+# E2E ciclo diretta web: status, HLS, pausa, ripresa.
+set -euo pipefail
+
+SESSION_ID="${SESSION_ID:-fe09a29f-79db-44d5-864f-397942c0a2c5}"
+API="${API:-https://www.matchlivetv.it}"
+EMAIL="${TEST_EMAIL:-coach@matchlivetv.test}"
+PASSWORD="${TEST_PASSWORD:-password123}"
+
+fail() { echo "FAIL: $*"; exit 1; }
+ok() { echo "OK: $*"; }
+
+echo "== Login =="
+TOKEN=$(curl -sf -X POST "$API/api/v1/auth/login" \
+  -H "Content-Type: application/json" \
+  -d "{\"email\":\"$EMAIL\",\"password\":\"$PASSWORD\"}" \
+  | python3 -c "import sys,json; print(json.load(sys.stdin)['access_token'])")
+AUTH="Authorization: Bearer $TOKEN"
+
+echo "== Status iniziale =="
+INIT=$(curl -sf "$API/live/$SESSION_ID/status.json")
+echo "$INIT" | python3 -m json.tool
+python3 -c "
+import json,sys
+d=json.loads('''$INIT''')
+assert not d.get('stream_closed'), d
+print('status', d.get('status'), 'on_air', d.get('on_air'), 'publisher', d.get('publisher_online'))
+"
+
+echo "== HLS master =="
+MASTER=$(curl -sf "$API/hls/live/match_${SESSION_ID}/index.m3u8")
+echo "$MASTER" | head -8
+echo "$MASTER" | grep -q main_stream || fail "master senza variant"
+VARIANT_LINE=$(echo "$MASTER" | grep main_stream | head -1 | tr -d '\r')
+VARIANT_URL="$API/hls/live/match_${SESSION_ID}/${VARIANT_LINE}"
+MEDIA=$(curl -sf "$VARIANT_URL")
+SEG=$(echo "$MEDIA" | grep '_main_seg' | tail -1 | tr -d '\r')
+[[ -n "$SEG" ]] || fail "nessun segmento in playlist"
+SEG_URL="$API/hls/live/match_${SESSION_ID}/${SEG}"
+SZ=$(curl -sf -o /tmp/live_e2e_seg.ts -w '%{size_download}' "$SEG_URL")
+[[ "${SZ:-0}" -gt 1000 ]] || fail "segmento troppo piccolo ($SZ bytes)"
+ok "HLS segmento ${SZ} bytes"
+
+if [[ "$(echo "$INIT" | python3 -c "import sys,json; print(json.load(sys.stdin).get('paused'))")" == "True" ]]; then
+  echo "== Sessione in pausa: test resume =="
+  curl -sf -X PATCH -H "$AUTH" "$API/api/v1/sessions/$SESSION_ID/resume" >/dev/null
+  sleep 6
+fi
+
+echo "== Verifica live (publisher atteso) =="
+for i in 1 2 3 4 5 6 7 8 9 10; do
+  ST=$(curl -sf "$API/live/$SESSION_ID/status.json")
+  PUB=$(echo "$ST" | python3 -c "import sys,json; print(json.load(sys.stdin).get('publisher_online'))")
+  PAUSED=$(echo "$ST" | python3 -c "import sys,json; print(json.load(sys.stdin).get('paused'))")
+  echo "  poll $i paused=$PAUSED publisher_online=$PUB"
+  if [[ "$PAUSED" == "False" && "$PUB" == "True" ]]; then
+    ok "live attivo"
+    break
+  fi
+  sleep 2
+  if [[ "$i" == "10" ]]; then
+    echo "WARN: live non confermato entro 20s (continuo pausa test)"
+  fi
+done
+
+echo "== Pausa API =="
+curl -sf -X PATCH -H "$AUTH" "$API/api/v1/sessions/$SESSION_ID/pause" >/dev/null
+sleep 8
+PAUSE_ST=$(curl -sf "$API/live/$SESSION_ID/status.json")
+echo "$PAUSE_ST" | python3 -m json.tool | head -12
+python3 -c "
+import json,sys
+d=json.loads('''$PAUSE_ST''')
+assert d.get('paused') or d.get('status')=='paused', d
+print('paused OK')
+"
+
+echo "== Ripresa API =="
+curl -sf -X PATCH -H "$AUTH" "$API/api/v1/sessions/$SESSION_ID/resume" >/dev/null
+sleep 8
+RES=$(curl -sf "$API/live/$SESSION_ID/status.json")
+echo "$RES" | python3 -m json.tool | head -12
+python3 -c "
+import json,sys
+d=json.loads('''$RES''')
+assert not d.get('paused'), d
+assert d.get('status') in ('live','connecting'), d
+print('resume OK')
+"
+
+echo "== Telemetry device =="
+curl -sf -H "$AUTH" "$API/api/v1/sessions/$SESSION_ID" \
+  | python3 -c "import sys,json; d=json.load(sys.stdin); dev=d.get('devices') or []; print('devices', dev[:2])"
+
+ok "Ciclo E2E API/HLS completato"