[lint] fix more issues

Author: capcom6

pkg/cache/memory_bench_test.go

@@ -408,7 +408,7 @@ func BenchmarkMemoryCache_RandomAccess(b *testing.B) {
 	const numKeys = 1000
 
 	// Pre-populate cache with many keys
-	for i := 0; i < numKeys; i++ {
+	for i := range numKeys {
 		key := "key-" + strconv.Itoa(i)
 		value := "value-" + strconv.Itoa(i)
 		cache.Set(ctx, key, []byte(value))

pkg/cache/memory_concurrency_test.go

@@ -409,7 +409,7 @@ func TestMemoryCache_RaceConditionDetection(_ *testing.T) {
 
 	start := time.Now()
 
-	for i := 0; i < numGoroutines; i++ {
+	for i := range numGoroutines {
 		wg.Add(1)
 		go func(goroutineID int) {
 			defer wg.Done()