fix: vendor-based Docker build, playwright upgrade, and CI cross-repo checkout

- Dockerfile now installs schwab-scraper from vendor/ dir (no git needed)
- Upgrade playwright to latest to match browserless chromium container
- CI workflow checks out schwab-scraper into vendor/ before build
- Add scripts/build.sh for local builds via docker-test
- Add curl to runtime image for compose healthcheck
- Increase memory limit to 512M for large account position scraping

.gitea/workflows/build.yaml

@@ -15,6 +15,13 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
 
+      - name: Checkout schwab-scraper
+        uses: actions/checkout@v3
+        with:
+          repository: b3nw/schwab-scraper
+          path: vendor/schwab-scraper
+          token: ${{ secrets.CR_PAT }}
+
       - name: Login to Gitea Container Registry
         uses: docker/login-action@v2
         with:
@@ -28,5 +35,3 @@ jobs:
           context: .
           push: true
           tags: gitea.ext.ben.io/${{ gitea.repository }}:latest
-          build-args: |
-            GIT_TOKEN=${{ secrets.CR_PAT }}