TEL AVIV — German Foreign Minister Johann Wadephul said Monday that a ceasefire in Gaza and the release by Hamas of all the remaining Israeli hostages could be achieved within a week, stressing Europe’s role in securing a deal. “I hope that within the next week we can reach an initial agreement — meaning a ceasefire, the release of the hostages, and humanitarian aid for Gaza,” Wadephul told Paul Ronzheimer of the Axel Springer Global Reporters Network, of which POLITICO is a member, during an