feat: explorer API, wallet, CCIP scripts, and config refresh

- Backend REST/gateway/track routes, analytics, Blockscout proxy paths.
- Frontend wallet and liquidity surfaces; MetaMask token list alignment.
- Deployment docs, verification scripts, address inventory updates.

Check: go build ./... under backend/ (pass).
Made-with: Cursor

deployment/systemd/solacescanscout-frontend.service

@@ -0,0 +1,28 @@
+[Unit]
+Description=SolaceScanScout Next Frontend Service
+After=network.target
+Wants=network.target
+
+[Service]
+Type=simple
+User=www-data
+Group=www-data
+WorkingDirectory=/opt/solacescanscout/frontend/current
+Environment=NODE_ENV=production
+Environment=HOSTNAME=127.0.0.1
+Environment=PORT=3000
+ExecStart=/usr/bin/node /opt/solacescanscout/frontend/current/server.js
+Restart=always
+RestartSec=5
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=solacescanscout-frontend
+NoNewPrivileges=true
+PrivateTmp=true
+ProtectSystem=strict
+ProtectHome=true
+ReadWritePaths=/opt/solacescanscout/frontend
+LimitNOFILE=65536
+
+[Install]
+WantedBy=multi-user.target