chore: add robinhood chain deployment

[McOso]

📝 Description

yarn validate-latest-contracts 4663,46630
Testing version 1.3.0
Chains: Robinhood Chain, Robinhood Chain Testnet
Robinhood Chain Testnet succeeded
Robinhood Chain succeeded
Successfully validated contract deployments

🔄 What Changed?

List the specific changes made:

🚀 Why?

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🧪 How to Test?

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• Manual testing steps:

• Automated tests added/updated
• All existing tests pass

⚠️ Breaking Changes

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• No breaking changes
• Breaking changes (describe below):

📋 Checklist

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• Code follows the project's coding standards
• Self-review completed
• Documentation updated (if needed)
• Tests added/updated
• Changelog updated (if needed)
• All CI checks pass

🔗 Related Issues

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Related to #

📚 Additional Notes

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---

Note

Low Risk
Additive chain metadata and address mappings only; no changes to contract logic or existing chain entries.

Overview
Registers Robinhood Chain (chain ID 4663 / 0x1237) and Robinhood Chain Testnet (46630 / 0xb626) in @metamask/delegation-deployments so consumers can resolve the standard 1.3.0 delegator deployment set on those networks.

CHAIN_ID and DELEGATOR_CONTRACTS in src/index.ts are extended for both chains. The contract validation script gains matching viem Chain definitions (Robinhood RPC URLs, ETH as native currency) so validate-latest-contracts can run against 4663 and 46630. The unreleased changelog entry documents the addition.

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[jeffsmale90]

lgtm!