- Added rich error reporting to install_repos() for clearer installer failure context (repository identifier, repo directory, installer name, exit code). - Updated E2E test 'install_all_shallow' to show additional diagnostics, including Nix profile dumps and contextual SystemExit handling. - Removed outdated/deactivated test file. - New test now mirrors the robust debugging flow of the pkgmgr-only test. See conversation for full context: https://chatgpt.com/share/6936241b-52ec-800f-9859-1734a581c002