Vikunja: Every /api/v2 pre-auth endpoint is unthrottled on a stock install while its /api/v1 twin is rate limited

Summary registerAPIRoutesV2 never applies the unconditional pre-auth rate-limit floor unauthRateLimit to the v2 public routes — it passes that limiter only to /api/v2/ws — and otherwise relies on setupRateLimit, which registers nothing when ratelimit.enabled is false the default. So on a stock...