[Sandbox] Simulate publishing a company's contractor tax statements

Simulate publishing all draft contractor tax statements (1099-NEC) for the company for the current tax statement season. Sandbox-only: in production this endpoint returns a 404.

Contractor tax statements must be enabled for your account. When they are disabled, this endpoint returns a 404. The company must be publishable for the season's year and have at least one draft contractor tax statement with data. Publishing runs asynchronously; poll GET /contractor_tax_statements or listen for contractor_tax_statement.updated webhooks as statements publish. Returns an empty response body on success.