feat(ci): smoke test production deploy after up --wait

Mirrors the nightly.yml smoke step against archiv.raddatz.cloud. Catches
the same three failure modes (Caddy not reloaded, DNS missing, HSTS
dropped, /actuator block bypassed) on the prod path.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -74,6 +74,18 @@ jobs:
             --env-file .env.production \
             up -d --wait --remove-orphans
 
+      - name: Smoke test deployed environment
+        # See nightly.yml — same three checks, against the prod vhost.
+        run: |
+          set -e
+          URL="https://archiv.raddatz.cloud"
+          echo "Smoke test: $URL"
+          curl -fsS --max-time 10 "$URL/login" -o /dev/null
+          curl -fsS --max-time 10 -I "$URL/" | grep -qi 'strict-transport-security'
+          status=$(curl -s -o /dev/null -w "%{http_code}" --max-time 10 "$URL/actuator/health")
+          [ "$status" = "404" ] || { echo "expected 404 from /actuator/health, got $status"; exit 1; }
+          echo "All smoke checks passed"
+
       - name: Cleanup env file
         if: always()
         run: rm -f .env.production