OTTAWA, April 25 (Reuters) - Canada's largest federal strike in years reached its seventh day on Tuesday as public and private unions watched to see if remote working would be built into the collective bargaining agreement. "A lot of other workers are watching to see what's going to happen because this is a fundamental issue in so many workplaces," said Katherine Nastovski, an assistant professor in work and labour studies at York University. See here for a complete list of exchanges and delays