Thin wrapper around Hammer for gate keeping domain-specific events during the ingestion phase. When the site is allowed, gate keeping check returns :allow, otherwise a :deny tagged tuple is returned with one of the following policy markers:

• :not_found (indicates site not found in cache)
• :block (indicates disabled sites)
• :throttle (indicates rate limiting)

Rate Limiting buckets are configured per site (externally via the CRM). See: Plausible.Site

To look up each site's configuration, the RateLimiter fetches a Site by domain using Plausible.Cache interface.

The module defines two policies outside the regular bucket inspection:

• when the the site is not found in cache: not_found
• when the underlying rate limiting mechanism returns an internal error: :allow