chore: satisfy gci and modernize linters

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: jensneuse

v2/pkg/engine/datasource/httpclient/nethttpclient.go

@@ -259,10 +259,7 @@ func makeHTTPRequest(client *http.Client, ctx context.Context, baseHeaders http.
 	// the compressed size, so this remains a safe lower-bound hint.
 	if cl := response.ContentLength; cl > 0 {
 		const maxPreAlloc = 1 << 21 // 2 MiB
-		want := int(cl)
-		if want > maxPreAlloc {
-			want = maxPreAlloc
-		}
+		want := min(int(cl), maxPreAlloc)
 		if want > out.Cap() {
 			out.Grow(want)
 		}

v2/pkg/engine/resolve/loader.go

@@ -795,12 +795,7 @@ func fetchTreeHasNestedParallel(node *FetchTreeNode) bool {
 			}
 		}
 	}
-	for _, child := range node.ChildNodes {
-		if fetchTreeHasNestedParallel(child) {
-			return true
-		}
-	}
-	return false
+	return slices.ContainsFunc(node.ChildNodes, fetchTreeHasNestedParallel)
 }
 
 func (l *Loader) callOnFinished(res *result) {

v2/pkg/engine/resolve/loader_dataflow.go

@@ -7,7 +7,9 @@ import (
 	"slices"
 
 	"github.com/pkg/errors"
+
 	"github.com/wundergraph/astjson"
+
 	"github.com/wundergraph/graphql-go-tools/v2/pkg/ast"
 )