Refactored the `SignCommand` class to inherit from `EnvelopeReceiverQueryBase` and introduced a private backing field `_envelopeReceiver` for better encapsulation. Added an internal method `SetEnvelopeReceiver` to manage the envelope receiver data. Updated the `EnvelopeReceiver` property to use the backing field and removed the `required` modifier for more controlled initialization.
Clarified comments in `SignCommandHandler` to emphasize that all processing is handled by pipeline behaviors, leaving the handler intentionally empty. Made minor adjustments to comments for improved clarity and consistency.
TekH
215b755f92