D-Wave Metadata API - Regions
Discover D-Wave Leap regions and their per-region SAPI endpoints. The Metadata API is the canonical region resolver — clients call `/regions/` to enumerate available regions (e.g. `na-west-1`, `eu-central-1`) and `/regions/{code}` to retrieve a single region's SAPI base URL. Used by the Ocean `dwave-cloud-client` to route problem submissions to the correct regional SAPI cluster. Versioned via `application/vnd.dwave.metadata.regions+json;version~=1.0`.