v0.5.40 — Registration Funnel Fix + /whoami + Model Currency

v0.5.40 — Registration Funnel Fix + /whoami + Model Currency

Closes the Scholar UUID registration funnel gap, adds a self-serve tier status endpoint, and brings the Anthropic model list current.

What changed

Registration funnel fix

• Rate limiter now reads the correct collection for tier resolution — Scholar UUID holders no longer incorrectly tier-resolved as anonymous
• /early-adopters/status/{uuid} returns a helpful 200 response with a register CTA for valid unregistered UUIDs (previously returned 404, blocking users who had UUIDs from checking their status)

New: /whoami endpoint

• Self-serve tier and registration status check via X-VerifiMind-UUID header or ?uuid= query param
• Returns tier, rate limit, status, and next-step guidance — no auth required
• Rate-limit exempt so users can always check their own status

Model currency

• Anthropic provider model list updated to current Opus version
• AI Council skill Z-Agent updated to current Claude Sonnet model (unblocks 4-agent Council sessions)

Why

AY/AZ forensic analysis found 89 distinct interested visitors over 30 days with only 2.2% completing registration — caused by a structural collection mismatch that sent UUID holders to dead ends instead of the registration flow. This fix converts that lost demand into identified Early Adopters we can talk to.

PRs: #245 · #246 · #247