Raise cronos feeHistory cap from 100 to 250

- Add FEEHISTORY_CAP env tunable with default 250
- Update init.sh to use FEEHISTORY_CAP for feehistory-cap in app.toml
- Maintain backward compatibility with JSON_RPC_FEEHISTORY_CAP
- Apply to both mainnet and testnet profiles

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

compose_registry.json

@@ -17,24 +17,6 @@
       "abcore-mainnet-geth-pruned-pebble-hash"
     ]
   },
-  {
-    "chain": "mainnet",
-    "client": "geth",
-    "compose_file": "abcore/geth/abcore-mainnet-geth-pruned-pebble-path",
-    "drpc_chain": "abcore",
-    "features": [
-      "hash",
-      "pebble"
-    ],
-    "network": "abcore",
-    "node": null,
-    "relay": null,
-    "stack": null,
-    "type": "pruned",
-    "volumes": [
-      "abcore-mainnet-geth-pruned-pebble-path"
-    ]
-  },
   {
     "chain": "mainnet",
     "client": "external-node",