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

scripts/complete-explorer-api-access.sh

@@ -138,6 +138,12 @@ server {
         add_header Cache-Control "public, max-age=3600";
         alias /var/www/html/config/DUAL_CHAIN_NETWORKS.json;
     }
+    location = /api/config/capabilities {
+        default_type application/json;
+        add_header Access-Control-Allow-Origin *;
+        add_header Cache-Control "public, max-age=3600";
+        alias /var/www/html/config/CHAIN138_RPC_CAPABILITIES.json;
+    }
 
     location = / {
         root /var/www/html;