ripple: deployable mainnet + testnet rippled with health checks

Fix mainnet rippled.cfg (ws,http RPC, port_peer 13331), strip eth-isms
from x-upstreams, add testnet chain assets/compose, and wire --ripple
sync-status via check-health.sh server_info probe.

Co-authored-by: Cursor <cursoragent@cursor.com>

compose_registry.json

@@ -7901,6 +7901,22 @@
       "ripple-mainnet-rippled-pruned-nudb"
     ]
   },
+  {
+    "chain": "testnet",
+    "client": "rippled",
+    "compose_file": "ripple/rippled/ripple-testnet-rippled-pruned-nudb",
+    "features": [
+      "nudb"
+    ],
+    "network": "ripple",
+    "node": null,
+    "relay": null,
+    "stack": null,
+    "type": "pruned",
+    "volumes": [
+      "ripple-testnet-rippled-pruned-nudb"
+    ]
+  },
   {
     "chain": "mainnet",
     "client": "ronin",