Add optional pprof endpoint for debugging

cmd/server/main.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"log/slog"
 	"net/http"
+	_ "net/http/pprof" // registers /debug/pprof on http.DefaultServeMux (served only on PprofAddr)
 	"os"
 
 	"github.com/golang-migrate/migrate/v4"
@@ -48,6 +49,18 @@ func main() {
 
 	go scheduler.New(st, orch).Start(context.Background())
 
+	// Optional pprof endpoint on a separate, non-published listener so we can
+	// pull live goroutine dumps (docker compose exec app wget -qO-
+	// localhost:6060/debug/pprof/goroutine?debug=2) without killing the process.
+	if cfg.PprofAddr != "" {
+		go func() {
+			slog.Info("pprof listening", "addr", cfg.PprofAddr)
+			if err := http.ListenAndServe(cfg.PprofAddr, nil); err != nil {
+				slog.Error("pprof serve", "err", err)
+			}
+		}()
+	}
+
 	slog.Info("listening", "addr", cfg.HTTPAddr)
 	if err := http.ListenAndServe(cfg.HTTPAddr, srv.Router()); err != nil {
 		slog.Error("serve", "err", err)