Replace fmt.Printf logging calls with slog.Info/slog.Error for structured
JSON output to stderr. Add internal/log package to initialize the default
slog handler from the config log level. Fix .gitignore to only ignore the
binary at the repo root, not the cmd/eng-pad-server directory.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Kyle Isom
a9e6ca022e