PersistentDataModelAthenaPool: (Re-)Make DataHeaderCnv an EndInputFile listener
It looks like in !43452 (merged) I accidentally dropped DataHeaderCnv
being a listener of EndInputFile
incident. This seems to have caused the memory retention reported in ATEAM-758. This MR should fix the problem. Thanks a lot to @mnowak for catching it! Let me also tag @gemmeren.
Closes ATEAM-758