fix: extend CI health check timeout from 15s to 90s (6 retries × 15s)

justfile

@@ -259,12 +259,12 @@ deploy-prod version:
     docker compose pull app && \
     docker compose up -d app && \
     echo "Waiting for production site to be healthy..." && \
-    for i in {1..30}; do \
+    for i in {1..6}; do \
       if curl -sf https://euchre.notsosm.art/api/health > /dev/null 2>&1; then \
         echo "✅ Production successfully deployed with version {{version}}"; \
         exit 0; \
       fi; \
-      sleep 0.5; \
+      sleep 15; \
     done && \
     echo "❌ Production deployment failed - health check timed out"; \
     docker compose logs app; \