MONTREAL — SNC-Lavalin's sudden return to the spotlight brings renewed focus on the beleaguered engineering firm's health, along with the potential economic consequences if it continues its path of decline. SNC-Lavalin Group Inc.'s bidding prospects, reputation and stock price have been causes for concern in a year that has seen its own financial woes conflated with its role in a political scandal that continues to dog Prime Minister Justin Trudeau. Canada's ethics commissioner said Wednesday that the prime minister improperly pressured the attorney general to overrule federal prosecutors to grant the construction giant a sweetheart deal on corruption charges, bringing SNC's pending criminal trial back into the headlines. But it remains unclear whether a conviction for the company, which employs some 8,700 people in Canada, would result in the dire economic fallout the government has feared.