Search people in a workspace

Prefix-search the people an asset in this workspace can be shared with — active members plus external viewers provisioned for the workspace — by email, first name or last name. Built for share pickers: a query of at least two characters is required, results are capped, and only name and email are returned (no user ids). Callers must be a member of the workspace (or a deployment admin). External SSO viewers may search only their own workspace, only see people in their own email domain, receive at most 10 results per call, and hold a per-viewer budget of 120 searches per 10 minutes (429 with Retry-After when exhausted; 503 if the budget cannot be enforced).