Native HubSpot CRM integration for DocuSign template field prefill

Allow Docusign document templates to connect directly to HubSpot CRM so that when sending an envelope, contact/company fields (name, title, company, address, etc.) are automatically pulled and prefilled without requiring a custom API integration or workflows. 

Desired behavior:

• Map Docusign template fields (e.g. customer_name, customer_company) to HubSpot contact/company properties in the template editor
• When sending, Docusign auto-fetches the mapped values from HubSpot