Returns paginated authentication events from every tenant, intended for platform security analysts investigating cross-tenant brute-force or credential-stuffing patterns. When the {@code tenantIds} filter is omitted, the query INCLUDES pre-authentication events that never resolved to a tenant (tenant_id IS NULL) — these are the most valuable rows for attack detection. When the filter is provided, null-tenant rows are excluded by design. The applied window and the maximum this feed accepts are stated on every accepted response in appliedRange; this description asserts neither.