Tuza's Ryser-conjecture claim for four-partite hypergraphs with matching number two

We prove that every $4$-partite $4$-uniform hypergraph $H$ with matching number $ν(H)=2$ satisfies $τ(H)\le 6$, where $τ$ denotes the vertex-cover number. This confirms a claim made by Tuza in his 1979 manuscript but never published with a proof, and closes the case $(r,ν)=(4,2)$ of Ryser's conjectu