FRANKFURT (Reuters) – The property market is a “key vulnerability” for euro zone banks as the rise of remote working since the pandemic dents demand for offices and households take on more debt to buy expensive homes, the European Central Bank said on Wednesday. Central bankers have been ringing alarm bells about the euro zone’s booming property market that has a decade of ultra-low interest rates and light-touch prudential regulation have helped create. In the latest warning, the ECB’s supervisors said commercial and residential real estate had become a cause for concern, and they planned to …