Add ronin-mainnet and ronin-saigon op-reth (OP-stack migration, May 12 2026)

Ronin migrated from standalone sidechain to OP-stack L2 operated by
Conduit, with EigenDA V2 for data availability. New composes follow
conduitxyz/ronin-migration-reth-docker: conduit-op-reth fork +
op-node v1.16.5 + eigenda-proxy 2.7.0 relay.

- op/ronin/{mainnet,saigon}: Conduit genesis (bedrockBlock patched to
  55577500 / 45528550) and rollup.json (alt_da GenericCommitment injected)
- saigon is a NEW chain post-migration: chainid 202601, L1 sepolia
- also regenerated: xlayer-testnet composes (dshackle chain label was
  corrupted to 'ronin' by an override typo), native ronin/ronin composes
  (upstream labels follow new chain ids), reference-rpc-endpoint.json

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

compose_registry.json

@@ -6350,6 +6350,40 @@
       "op-sepolia-op-reth-pruned-trace"
     ]
   },
+  {
+    "chain": "mainnet",
+    "client": "reth",
+    "compose_file": "op/reth/ronin-mainnet-op-reth-archive-trace",
+    "features": [
+      "trace"
+    ],
+    "network": "ronin",
+    "node": "node",
+    "relay": "eigenda-proxy",
+    "stack": "op",
+    "type": "archive",
+    "volumes": [
+      "ronin-mainnet-op-reth-archive-trace",
+      "ronin-mainnet-op-reth-archive-trace_eigenda-proxy"
+    ]
+  },
+  {
+    "chain": "saigon",
+    "client": "reth",
+    "compose_file": "op/reth/ronin-saigon-op-reth-archive-trace",
+    "features": [
+      "trace"
+    ],
+    "network": "ronin",
+    "node": "node",
+    "relay": "eigenda-proxy",
+    "stack": "op",
+    "type": "archive",
+    "volumes": [
+      "ronin-saigon-op-reth-archive-trace",
+      "ronin-saigon-op-reth-archive-trace_eigenda-proxy"
+    ]
+  },
   {
     "chain": "mainnet",
     "client": "reth",