morph-mainnet: add generated compose (Scroll-l2geth EL + op-node-style CL)

EL morph-geth (go-ethereum 2.2.3, --morph --morph-mpt, archive leveldb/hash/mpt,
pure EL driven via engine API) + CL morph-node (node:0.5.7, env-driven, derives from
eth-mainnet L1). Params from authoritative morph-l2/run-morph-node. Fresh L1 derivation.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

compose_registry.json

@@ -3561,6 +3561,25 @@
       "metis-andromeda-sepolia-l2geth-archive-leveldb-hash_dtl"
     ]
   },
+  {
+    "chain": "mainnet",
+    "client": "l2geth",
+    "compose_file": "morph/l2geth/morph-mainnet-l2geth-archive-leveldb-hash-mpt",
+    "features": [
+      "hash",
+      "leveldb",
+      "mpt"
+    ],
+    "network": "morph",
+    "node": "morph-node",
+    "relay": null,
+    "stack": null,
+    "type": "archive",
+    "volumes": [
+      "morph-mainnet-l2geth-archive-leveldb-hash-mpt",
+      "morph-mainnet-l2geth-archive-leveldb-hash-mpt_morph-node"
+    ]
+  },
   {
     "chain": "mainnet",
     "client": "erigon",