Under the hood
Message attribution now recognizes 'owner' as a source, alongside typed and relay
What
The code that determines who or what sent a message previously recognized typed and relay as attribution sources, collapsing anything else to "unattributed." It now also recognizes an owner source value and passes it through instead of discarding it, with corresponding new cases added to related switch statements.
Why
Messages attributed to an owner are now tracked distinctly instead of being lumped in as unattributed, giving more accurate accounting of where a message came from.