refactor: update dependencies and remove unused code

- Added new dependencies: `adler2`, `crc32fast`, `flate2`, `miniz_oxide`, and `libredox`.
- Updated existing dependencies: `tokio-rustls` to version 0.26.4 and `filetime` to version 0.2.27.
- Removed the `backup.rs` file as it is no longer needed.
- Introduced tests for configuration and credential management.
- Enhanced the `identity` module to generate W3C compliant DID documents.

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

scripts/deploy-to-target.sh

@@ -63,6 +63,15 @@ if ! ssh $SSH_OPTS -o ConnectTimeout=5 "$TARGET_HOST" "echo ok" >/dev/null 2>&1;
     exit 1
 fi
 echo "   Connected."
+
+# Pre-deploy health check (informational — warns but does not block)
+TARGET_IP_ONLY="$(echo "$TARGET_HOST" | cut -d@ -f2)"
+PRE_HEALTH=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 5 "http://$TARGET_IP_ONLY/health" 2>/dev/null || echo "000")
+if [ "$PRE_HEALTH" = "200" ]; then
+    echo "   Server health: OK (200)"
+else
+    echo "   ⚠️  Server health: $PRE_HEALTH (may be down or unhealthy — deploying anyway)"
+fi
 echo ""
 
 # When --both: deploy to 228 first, then copy to 198
@@ -634,13 +643,32 @@ PYEOF
 
     fi  # end FRONTEND_ONLY guard
 
+    # Post-deploy health check — wait up to 60s for server to come healthy
+    echo ""
+    echo "$(timestamp) 🩺 Post-deploy health check..."
+    HEALTH_OK=false
+    for i in $(seq 1 12); do
+        POST_HEALTH=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 5 "http://$TARGET_IP_ONLY/health" 2>/dev/null || echo "000")
+        if [ "$POST_HEALTH" = "200" ]; then
+            echo "   Health: OK (200) after $((i * 5))s"
+            HEALTH_OK=true
+            break
+        fi
+        echo "   Health: $POST_HEALTH (waiting... ${i}/12)"
+        sleep 5
+    done
+    if [ "$HEALTH_OK" = false ]; then
+        echo "   ⚠️  Server did not become healthy within 60s (last: $POST_HEALTH)"
+        echo "   Rollback: ssh $TARGET_HOST and check 'sudo journalctl -u archipelago -n 50'"
+    fi
+
     DEPLOY_END=$(date +%s)
     DEPLOY_ELAPSED=$((DEPLOY_END - DEPLOY_START))
     echo ""
     echo "$(timestamp) ✅ Deployed to live system! (${DEPLOY_ELAPSED}s total)"
     echo "   Backend: $(ssh $SSH_OPTS "$TARGET_HOST" 'sudo systemctl is-active archipelago')"
-    echo "   Web UI: http://$(echo $TARGET_HOST | cut -d@ -f2)"
-    echo "   PWA install: https://$(echo $TARGET_HOST | cut -d@ -f2) (use HTTPS, accept cert once, then Install app)"
+    echo "   Web UI: http://$TARGET_IP_ONLY"
+    echo "   PWA install: https://$TARGET_IP_ONLY (use HTTPS, accept cert once, then Install app)"
 else
     echo ""
     echo "✅ Build complete!"