Add mainnet checkpoint stack: ISO attestation, participant Etherscan surface, and services.

Ship AddressActivityRegistry V1/V2, ISO20022IntakeGateway, Chain138ParticipantSurface,
checkpoint hub contracts, checkpoint-core package, aggregator/indexer/sdk services,
relay profile guards, M00 diamond bridge facet, and OMNL compliance contracts.

Co-authored-by: Cursor <cursoragent@cursor.com>

script/mainnet-checkpoint/SimulateSubmitFromCalldata.s.sol

@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+import {Script, console} from "forge-std/Script.sol";
+import {Chain138MainnetCheckpoint} from "../../contracts/mainnet-checkpoint/Chain138MainnetCheckpoint.sol";
+
+/// @notice Replay aggregator calldata on a mainnet fork to surface revert reason.
+contract SimulateSubmitFromCalldata is Script {
+    function run() external {
+        address hub = vm.envAddress("CHAIN138_MAINNET_CHECKPOINT_PROXY");
+        bytes memory data = vm.envBytes("CHECKPOINT_SUBMIT_CALLDATA");
+        vm.prank(vm.envAddress("CHECKPOINT_SUBMIT_FROM"));
+        (bool ok, bytes memory ret) = hub.call(data);
+        if (!ok) {
+            if (ret.length > 0) {
+                console.logBytes(ret);
+            }
+            revert("submit simulation failed");
+        }
+        console.log("ok, latest", Chain138MainnetCheckpoint(hub).getLatestBatchId());
+    }
+}