delete
https://apis.kentro.live/channel/v1/vendors/
A vendor a warehouse or a location still references is not deleted: 409 state_conflict.
Scope: products:write, channel:write or admin.
Idempotency: send Idempotency-Key; a retry with the same key replays the first answer.
Rate limit: write class, 1,200 requests per minute per tenant by default (read class 6,000). Every response carries X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Reset; a refusal is 429 rate_limited with Retry-After.
