Robinhood Chain integration

Robinhood Chain is the proposed first deployment environment, not a permanent protocol boundary.

Official Robinhood Chain documentation identifies canonical token contracts, including USDG, and publishes an onchain registry for Stock Tokens and tokenized ETFs. Robinhood's Stock Tokens are standard ERC-20 tokens and expose an onchain corporate-action multiplier. Chainlink price feeds incorporate that multiplier into the quoted token price.

For integration, Vadium should:

• Whitelist only canonical contracts from the official registry.
• Validate oracle freshness and feed parameters.
• Check sequencer uptime and any token oracle-pause state.
• Treat corporate-action pauses as explicit market-state inputs.
• Keep issuer/chain logic behind adapters so other RWA ecosystems can be added later.