SAN DIEGO — The federal government has completed a $134 million modernization and expansion project at the Otay Mesa Port of Entry that includes more processing capacity for both pedestrians and commercial vehicles. The project — which started in May 2020 — represents the largest investment at the port of entry since 1986, said Ramón Riesgo, project director for the southern border with the U.S. General Services Administration. Some major stages of the project were completed last year, but the agency announced the project’s overall completion Thursday. The last stage included the repaving of a…