OTTAWA—It would be a distraction and a waste of time for the Emergencies Act inquiry to pursue a “Freedom Convoy” lawyer’s conspiracy theory that has “little foundation in evidence,” says the judge leading the process. In a decision released Wednesday morning, commissioner Paul Rouleau rejected a written application by the lawyer representing some organizers of last winter’s protests against pandemic health measures to call new witnesses and documents in the final week of public hearings at the inquiry. Brendan Miller, the lawyer for a charity called Freedom Corp, has claimed the federal government tried to discredit convoy protesters as extremists....