[#1065] adm: refactor dump-config

Signed-off-by: Alexander Chuprov <a.chuprov@yadro.com>

cmd/frostfs-adm/internal/modules/morph/config/config.go

@@ -105,12 +105,22 @@ func SetConfigCmd(cmd *cobra.Command, args []string) error {
 	forceFlag, _ := cmd.Flags().GetBool(forceConfigSet)
 
 	bw := io.NewBufBinWriter()
+	prm := make(map[string]any)
+
 	for _, arg := range args {
 		k, v, err := parseConfigPair(arg, forceFlag)
 		if err != nil {
 			return err
 		}
 
+		prm[k] = v
+	}
+
+	if err := validateConfig(prm); err != nil {
+		return err
+	}
+
+	for k, v := range prm {
 		// In NeoFS this is done via Notary contract. Here, however, we can form the
 		// transaction locally. The first `nil` argument is required only for notary
 		// disabled environment which is not supported by that command.
@@ -128,6 +138,16 @@ func SetConfigCmd(cmd *cobra.Command, args []string) error {
 	return wCtx.AwaitTx()
 }
 
+func validateConfig(args map[string]any) error {
+	for k, v := range args {
+		value, ok := v.(int64)
+		if !ok || value < 0 {
+			return fmt.Errorf("%s must be >= 0, got %v", k, v)
+		}
+	}
+	return nil
+}
+
 func parseConfigPair(kvStr string, force bool) (key string, val any, err error) {
 	k, v, found := strings.Cut(kvStr, "=")
 	if !found {