Retry learning database connection on startup

cmd/server/main.go

@@ -32,7 +32,7 @@ func main() {
 	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
 	defer stop()
 
-	pool, err := commondb.ConnectURL(cfg.DatabaseURL)
+	pool, err := commondb.ConnectWithRetry(ctx, cfg.DatabaseURL, 2*time.Minute)
 	if err != nil {
 		slog.Error("connect database", "error", err)
 		os.Exit(1)