More than half of deaths in federal prisons over the course of eight years were suicides — and many of those could’ve been prevented, a scathing new report released Thursday by a Justice Department watchdog has found. After assessing the circumstances surrounding the deaths of inmates in federal prisons from 2014 through 2021, watchdog investigators found “several operational and managerial deficiencies, which created unsafe conditions prior to and at the time of a number of these deaths,” according to the 111-page report. The assessment focused on 344 inmate deaths at the Federal Bureau of Pr…