Include the entire original item when notifying other channels of deletions as it contains important routing and scope information. Previously we were only sending a couple of critical fields like the message-id, flags, and creation date. The thinking was that it is deleted, let's not resend the deleted contents anywhere. But in order to route this through the same path the original post took we really need the entire original post with all of its baggage attached.
move the deleted flag setting to encode_item_flags() where it belongs now that we aren't giving deleted posts special treatment.