feat: split web and scraper into separate Docker images

- Dockerfile: replace single runner stage with web + scraper named targets
  - web: Next.js standalone only — no playwright, tsx, or scripts
  - scraper: scripts/lib/node_modules/playwright only — no Next.js output
- docker-compose.yml: each service pulls its dedicated image tag
- .gitea/workflows/deploy.yml: build both targets on push to main
- lib/db.ts: STALE_AFTER_MS reads PARK_HOURS_STALENESS_HOURS env var (default 72h)
- lib/park-meta.ts: COASTER_STALE_MS reads COASTER_STALENESS_HOURS env var (default 720h)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   web:
-    image: gitea.thewrightserver.net/josh/sixflagssupercalendar:latest
+    image: gitea.thewrightserver.net/josh/sixflagssupercalendar:web
     ports:
       - "3000:3000"
     volumes:
@@ -10,13 +10,14 @@ services:
     restart: unless-stopped
 
   scraper:
-    image: gitea.thewrightserver.net/josh/sixflagssupercalendar:latest
+    image: gitea.thewrightserver.net/josh/sixflagssupercalendar:scraper
     volumes:
       - park_data:/app/data
     environment:
       - NODE_ENV=production
-      - TZ=America/New_York   # set your local timezone so "3am" is 3am your time
-    command: sh /app/scripts/scrape-schedule.sh
+      - TZ=America/New_York
+      - PARK_HOURS_STALENESS_HOURS=72
+      - COASTER_STALENESS_HOURS=720
     restart: unless-stopped
 
 volumes: