test(arreflect): add WithTemporal non-time type test, note timestamp exclusion

- Add test: FromSlice([]string{}, WithTemporal(date32)) returns
  ErrUnsupportedType, covering the element-type validation guard
- Add inline comment explaining why timestamp is excluded from the
  non-time.Time check (it is already a no-op via applyTemporalOpts)

Author: zeroshade

arrow/array/arreflect/reflect.go

@@ -401,6 +401,7 @@ func FromSlice[T any](vals []T, mem memory.Allocator, opts ...Option) (arrow.Arr
 	if err := validateTemporalOpt(tOpts.Temporal); err != nil {
 		return nil, err
 	}
+	// "timestamp" is excluded: it is a no-op for non-time.Time types via applyTemporalOpts.
 	if tOpts.Temporal != "" && tOpts.Temporal != "timestamp" {
 		goType := reflect.TypeFor[T]()
 		deref := goType

arrow/array/arreflect/reflect_public_test.go

@@ -249,6 +249,11 @@ func TestFromGoSlice(t *testing.T) {
 		_, err := FromSlice([]time.Time{}, mem, WithTemporal("invalid"))
 		assert.ErrorIs(t, err, ErrUnsupportedType)
 	})
+
+	t.Run("WithTemporal on non-time type returns error", func(t *testing.T) {
+		_, err := FromSlice([]string{}, mem, WithTemporal("date32"))
+		assert.ErrorIs(t, err, ErrUnsupportedType)
+	})
 }
 
 func TestRecordToSlice(t *testing.T) {