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>

.gitea/workflows/deploy.yml

@@ -4,26 +4,14 @@ on:
   push:
     branches:
       - main
-    tags:
-      - 'v*'
 
 jobs:
   build-push:
     name: Build & Push
     runs-on: ubuntu-latest
-    if: github.event_name == 'push'
     steps:
       - uses: actions/checkout@v4
 
-      - name: Docker metadata
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ vars.REGISTRY }}/${{ gitea.repository_owner }}/sixflagssupercalendar
-          tags: |
-            type=semver,pattern={{version}}
-            type=raw,value=latest,enable={{is_default_branch}}
-
       - name: Log in to Gitea registry
         uses: docker/login-action@v3
         with:
@@ -31,10 +19,18 @@ jobs:
           username: ${{ gitea.actor }}
           password: ${{ secrets.REGISTRY_TOKEN }}
 
-      - name: Build and push
+      - name: Build and push web image
         uses: docker/build-push-action@v6
         with:
           context: .
+          target: web
           push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
+          tags: ${{ vars.REGISTRY }}/${{ gitea.repository_owner }}/sixflagssupercalendar:web
+
+      - name: Build and push scraper image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          target: scraper
+          push: true
+          tags: ${{ vars.REGISTRY }}/${{ gitea.repository_owner }}/sixflagssupercalendar:scraper