Eve adapter gets opt-in token validation; revoked grants now prompt

Patch Changes

• 0afea93: Add an opt-in validate flag to the Eve connect() adapter (backed by a new forceRefresh option on getToken/getTokenResponse). When set, each getToken bypasses the in-process token cache and re-checks Vercel Connect, so a grant the user revoked server-side surfaces as an authorization-required prompt instead of being served as a stale, still-cached bearer.