Cross-Chain Carbon Credit Bridge (Stellar <-> Ethereum)

[Lynndabel]

Depends On: #377

🎯 Problem
Stellar carbon credits lack liquidity from the larger EVM DeFi ecosystem.

📋 Requirements

Bridge-Out Soroban contract

ERC-1155 Polygon/Eth contract

Secure relayer/bridge hook
🤔 Design Questions
Finality differences?
Cross-chain event synchronization?
📊 Acceptance Criteria
End-to-end bridging < 5 mins
Guaranteed token parity
Automated failure restoration
💬 Optimization Ideas
Use Merkle-tree based synchronization for verified history.