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/docker-compose.prod.yml

@@ -115,6 +115,7 @@ services:
         condition: service_started
     volumes:
       - recordings:/recordings
+      - stream_overlays:/app/tmp/stream_overlays
     healthcheck:
       test: ["CMD", "curl", "-f", "http://127.0.0.1:3000/up"]
       interval: 15s
@@ -150,6 +151,7 @@ services:
       REPLAY_STORAGE_ACCESS_KEY_ID: ${REPLAY_STORAGE_ACCESS_KEY_ID:-}
       REPLAY_STORAGE_SECRET_ACCESS_KEY: ${REPLAY_STORAGE_SECRET_ACCESS_KEY:-}
       REPLAY_STORAGE_FORCE_PATH_STYLE: ${REPLAY_STORAGE_FORCE_PATH_STYLE:-true}
+      OVERLAY_RELAY_PROCESS_CHECK: "false"
     depends_on:
       rails:
         condition: service_healthy
@@ -157,6 +159,7 @@ services:
         condition: service_started
     volumes:
       - recordings:/recordings
+      - stream_overlays:/app/tmp/stream_overlays
 
   garage:
     image: dxflrs/garage:v1.0.1
@@ -172,5 +175,6 @@ volumes:
   postgres_data:
   redis_data:
   recordings:
+  stream_overlays:
   garage_meta:
   garage_data: