BERLIN—Germany on Monday extended its current pandemic measures as the experts panel appointed by the government has warned the Omicron coronavirus variant could bring critical infrastructure in Europe’s biggest economy to a breaking point. Chancellor Olaf Scholz said he had agreed with the heads of the federal states to extend restrictions such as limiting private gatherings to 10 ten people and requiring proof of booster vaccination or a negative test at restaurants. “Now it’s time to stay on course,” said Scholz after a meeting on Monday. The government will reconsider relaxing or tightening the measures in case of a very steep rise or decline in infection numbers, Scholz added. Health Minister Karl Lauterbach said earlier this month he expected the infection wave to peak in mid-February. Scholz and the heads of states also agreed to prioritize the use of COVID-19 PCR testing and to increase testing capacity to cope with …