Dynamic proxies or Lazy properties for DataBus properties supporting lazy loading

[ramonsmits]

When a message with databus properties is received the behavior currently will always fetch the databus blobs even though they might not even be used by the receiver.

Having dynamic proxies for messages could enable lazy loading of databus blobs.

I don't think Lazy<T> can be used in messages but if so, than the lazy loading might be even made explicit.

[danielmarbach]

@ramonsmits You opened up a series of data bus improvement proposals. Would it make sense to collect those in one single platform dev issue and raise it to the awareness of the squad?