Better Auth CorePass Passkey Plugin

This package is a plugin for the Better Auth ecosystem, extending the functionality of the `@better-auth/passkey` plugin with CorePass-specific identity enrichment. It facilitates user registration via passkeys while integrating signed identity and profile data, such as Core ID, email, and KYC (Know Your Customer) flags, directly from the CorePass application. The plugin performs robust Ed448 signature verification on incoming enrichment data, validates Core IDs using `blockchain-wallet-validator`, and enforces configurable requirements like age verification (`requireO18y`, `requireO21y`) and KYC. It also dynamically updates user profiles and session data, including a `corepass_profile` with configurable expiry. Currently at version 0.1.18, the library exhibits a rapid release cadence with frequent updates and bug fixes, indicating active development. A key differentiator is its strict 'passkey-only access' policy, which blocks users without a registered passkey from most authentication endpoints, making it ideal for anonymous bootstrap flows requiring eventual strong identity binding.