1.0.0-alpha1

First alpha. SSO, Feeds-based event and membership sync, the member
directory and the SDC component library are implemented and covered by
the automated suite, but nothing has been verified against a live Membes
account: API response shapes, date formats and the JWKS structure are
inferred from the WordPress plugin. The aud and iss claims are not yet
pinned in TokenVerifier, pending that verification. See
docs/live-verification.md.