babylon: add mainnet babylond pruned compose (bbn-1)

Family-C CometBFT node with statesync, wasm-only snapshot bootstrap,
and babylon-specific config (timeout_commit, btc-config, iavl-cache).

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

compose_registry.json

@@ -1106,6 +1106,20 @@
       "aztec-testnet-aztec-pruned"
     ]
   },
+  {
+    "chain": "mainnet",
+    "client": "babylond",
+    "compose_file": "babylon/babylond/babylon-mainnet-babylond-pruned",
+    "features": [],
+    "network": "babylon",
+    "node": null,
+    "relay": null,
+    "stack": null,
+    "type": "pruned",
+    "volumes": [
+      "babylon-mainnet-babylond-pruned"
+    ]
+  },
   {
     "chain": "bepolia",
     "client": "geth",