- Queries Client_Case__c for Service_Coordinator__c and Docusign_Recipient_1__c
- Resolves Contact/User name and email from lookup targets
- Maps recipients to Docusign template roles: 'Service Coordinator' and 'Docusign Recipient #1'
- Validates recipients exist and have email addresses
- Supports both Contact and User lookup types
- Role names and field names are configurable constants at top of class
- Clear error messages if recipients are missing or have no email
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