Add logging infrastructure for warnings and errors. Errors and warnings are accumulated and summarized in the end. Assisted-by: Cursor:claude-sonnet-4-5 Assisted-by: OpenCode:GLM-4-7 Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com> Signed-off-by: Maximilian Huber <maximilian.huber@tngtech.com> Signed-off-by: Luis Augenstein <luis.augenstein@tngtech.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>