Refactored sender email resolution into a new private async
method `ResolveSenderReferenceAsync` to improve code
reusability and readability. Replaced inline logic for
resolving sender references with this method.
Added a `CreateHistoryCommand` to log envelope creation
events, including envelope ID, sender reference, and status
(`EnvelopeCreated`). This enhances auditability and ensures
consistent event logging.
TekH
519a8bf3f9