ERC721VotesLib

No own storage, init or ERC-165 id: it moves voting units in VotesLib (which registers IVotes) as ERC721Lib moves tokens. The base ERC721Lib has no hook (D25, option (a)), so voting power stays correct only while every token movement goes through _update here. The ERC721Votes facet replaces the base transfer selectors to do that. Any other code that moves a token on a votes diamond (a mint, a burn, or an authorization-free transfer) must call this library's _mint, _safeMint, _burn, _transfer, _safeTransfer or _update, never ERC721Lib's. ERC721Burnable and ERC721Wrapper call ERC721Lib directly, so they are mutually exclusive with this extension. The CCTPHookReceipt example also mints through ERC721Lib._mint; it is a standalone contract that cannot take this facet, and a fork of it that adds votes must mint here. Differences from OpenZeppelin v5.6.1:

• OpenZeppelin overrides _update, so every internal path (_mint, _burn, _transfer, _safeTransfer) moves voting units automatically. Here only this library's wrappers do: ERC721Lib._transfer and the other ERC721Lib internals move no units.
• OpenZeppelin overrides _increaseBalance to move batch-minted units. This library cannot see a batch (ERC721ConsecutiveLib._mintConsecutive), so the pair is forbidden: a batch on a votes diamond and ERC721VotesInit on a batch-minting diamond both revert ERC721VotesForbiddenBatchMint.
• Voting units are read from the ERC-721 balance by delegate and delegateBySig, which replace the base Votes facet's ERC-20-balance versions; OpenZeppelin overrides _getVotingUnits instead.

Like OpenZeppelin, it moves the unit before the caller checks the previous owner; every caller here reverts on a bad previous owner, which undoes the move.

Recovers the signer first to read its balance, then consumes the nonce and delegates, as ERC20VotesLib.delegateBySig does. Keep the nonce handling in step with VotesLib.delegateBySig.