bulkCreateAccounts creates up to 100 saved accounts in one provider request.
automations/bulk-create-apollo-accounts.automation.ts
Each account may include
name, domain, phone, rawAddress, stage,
owner, parentAccount, organizationId, CRM IDs, social URLs, and
customFields. Returns { createdAccounts, existingAccounts }; existing
deduplication matches are not silently mixed with newly created records.