fix: wrong data type (#110)

## Description

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relates to #1234

## Checklist

- [ ] Issue was linked above
- [ ] Code format was applied: `make fmt`
- [ ] Examples were added / adjusted (see `examples/` directory)
- [x] Docs are up-to-date: `make generate-docs` (will be checked by CI)
- [ ] Unit tests got implemented or updated
- [ ] Acceptance tests got implemented or updated (see e.g. [here](f5f99d1709/stackit/internal/services/dns/dns_acc_test.go))
- [x] Unit tests are passing: `make test` (will be checked by CI)
- [x] No linter issues: `make lint` (will be checked by CI)

Co-authored-by: Marcel S. Henselin <marcel.henselin@stackit.cloud>
Reviewed-on: #110

stackit/internal/services/postgresflexalpha/flavor/datasource.go

@@ -220,14 +220,24 @@ func (r *flavorDataSource) Read(ctx context.Context, req datasource.ReadRequest,
 	} else {
 		var scList []attr.Value
 		for _, sc := range f.StorageClasses {
+			mIop := types.Int32Null()
+			if val, ok := sc.GetMaxIoPerSecOk(); ok {
+				mIop = types.Int32Value(*val)
+			}
+
+			mThrough := types.Int32Null()
+			if val, ok := sc.GetMaxThroughInMbOk(); ok {
+				mThrough = types.Int32Value(*val)
+			}
+
 			scList = append(
 				scList,
 				postgresflexalphaGen.NewStorageClassesValueMust(
 					postgresflexalphaGen.StorageClassesValue{}.AttributeTypes(ctx),
 					map[string]attr.Value{
 						"class":             types.StringValue(sc.Class),
-						"max_io_per_sec":    types.Int64Value(int64(sc.GetMaxIoPerSec())),
-						"max_through_in_mb": types.Int64Value(int64(sc.GetMaxThroughInMb())),
+						"max_io_per_sec":    mIop,
+						"max_through_in_mb": mThrough,
 					},
 				),
 			)