Add hemi sepolia (testnet, chain 743111): op-geth pruned variant

hemi-testnet US-Central market $6/day with 2 providers. BTC side =
testnet3 (own hVM genesis @3522419), L1 = ethereum sepolia, snap sync,
genesis+rollup checked in per hemi-node testnet dir, fork overrides in
env/op/hemi/sepolia/.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

compose_registry.json

@@ -5454,6 +5454,23 @@
       "hemi-mainnet-op-geth-pruned-leveldb-hash"
     ]
   },
+  {
+    "chain": "sepolia",
+    "client": "geth",
+    "compose_file": "op/geth/hemi-sepolia-op-geth-pruned-leveldb-hash",
+    "features": [
+      "hash",
+      "leveldb"
+    ],
+    "network": "hemi",
+    "node": "node",
+    "relay": "bss",
+    "stack": "op",
+    "type": "pruned",
+    "volumes": [
+      "hemi-sepolia-op-geth-pruned-leveldb-hash"
+    ]
+  },
   {
     "chain": "mainnet",
     "client": "geth",