Clarify wrapped/unwrapped address naming in token registry #5

While cross-referencing the token registry against on-chain state, the address field in each token entry is the wrapped vault (ERC-4626), and extensions.unwrappedAddress is the receipt vault (ERC-20). However, the field naming is ambiguous — "unwrapped" in the registry means the receipt vault, but the actual addresses users interact with on st0x.io are the wrapped vaults.

This creates confusion when the site displays token addresses without clarifying which layer of the stack they represent:

• Receipt (ERC-1155)
• Receipt vault / "unwrapped" (ERC-20, e.g. tMSTR)
• Wrapped token vault (ERC-4626, e.g. wtMSTR)

The registry currently only tracks wrapped and unwrapped addresses. The ERC-1155 receipt contract address is not included at all.

Suggestion: Either rename unwrappedAddress to something unambiguous (e.g. receiptVaultAddress) and add a receiptAddress field, or add a comment/docs clarifying the naming convention.