BERLIN — Europe’s top defense officials used a meeting in Berlin on Friday to send a unified message of support for Ukraine. The main takeaways: Backing for Kyiv will remain open-ended, hybrid threats against Europe are accelerating, and the continent’s biggest military powers intend to take on a larger share of their own defense as the war enters another hard winter. German Defense Minister Boris Pistorius opened the session by emphasizing continuity. “Germany is prepared to continue taking