avalanche: add firewood profile for mainnet (pruning-free merkle DB)

Add new avalanchego v1.14.2 profile with Firewood state database backend:
- state-scheme: firewood (with required populate-missing-tries:null, snapshot-cache:0)
- state-sync-enabled: true (confirmed supported in v1.14.2)
- chain-config-dir: /config/firewood
- db-type: firewood
- coreth-state-scheme: firewood

Generated compose: avalanche-mainnet-go-firewood-firewood.yml

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

compose_registry.json

@@ -1174,6 +1174,23 @@
       "avalanche-mainnet-go-archive-leveldb"
     ]
   },
+  {
+    "chain": "mainnet-firewood-firewood",
+    "client": "go",
+    "compose_file": "avalanche/go/avalanche-mainnet-go-firewood-firewood",
+    "drpc_chain": "avalanche",
+    "features": [
+      "leveldb"
+    ],
+    "network": "avalanche",
+    "node": null,
+    "relay": null,
+    "stack": null,
+    "type": "archive",
+    "volumes": [
+      "avalanche-mainnet-go-firewood-firewood"
+    ]
+  },
   {
     "chain": "mainnet",
     "client": "go",