By Sonal Gupta, Local Journalism Initiative Reporter and Arno Kopecky, Canada’s National Observer As First Nations leaders head to Gatineau for a high-stakes summit with Prime Minister Mark Carney, tensions are running high over the federal government’s handling of Bill C-5 — a sweeping new law that accelerates approvals for major infrastructure and resource projects. Indigenous leaders say the process has left their communities out and broken promises to respect their rights, protect the environment and seek free, prior and informed consent. “We worked hard to get the prime minister to agree to this meeting,” said national chief Cindy Woodhouse-Nepinak, calling it a “historic” gathering. “First Nations cannot be on the sidelines in the year 2025.” But many see the haste with which the July 17 meeting was assembled as…