chore: enhance golangci-lint configuration and clean up error handling

- Added new linters for the examples directory to improve code quality checks.
- Updated output formatting to direct lint results to stdout for better visibility.
- Cleaned up comments related to error handling in various files for clarity and consistency.

cmd/generate-tests/main.go

@@ -220,12 +220,10 @@ func main() {
 		log.Fatalf("Failed to create output file: %v", err)
 	}
 	defer func() {
-		//nolint:errcheck // Close error is not critical, file is already written
 		_ = f.Close()
 	}()
 
 	if err := tmpl.Execute(f, testData); err != nil {
-		//nolint:errcheck // Close error is not critical before fatal exit
 		_ = f.Close()
 		//nolint:gocritic // Fatalf exits, defer won't run - this is acceptable
 		log.Fatalf("Failed to execute template: %v", err)

cmd/onvif-cli/ascii.go

@@ -220,17 +220,17 @@ type ImageInfo struct {
 }
 
 // formatBytes converts bytes to human-readable format.
-func formatBytes(bytes int64) string {
-	if bytes < bufferSize1024 {
-		return fmt.Sprintf("%d B", bytes)
+func formatBytes(byteCount int64) string {
+	if byteCount < bufferSize1024 {
+		return fmt.Sprintf("%d B", byteCount)
 	}
 	const kbSize = 1024
 	const mbSize = 1024 * 1024
-	if bytes < mbSize {
-		return fmt.Sprintf("%.1f KB", float64(bytes)/kbSize)
+	if byteCount < mbSize {
+		return fmt.Sprintf("%.1f KB", float64(byteCount)/kbSize)
 	}
 
-	return fmt.Sprintf("%.1f MB", float64(bytes)/mbSize)
+	return fmt.Sprintf("%.1f MB", float64(byteCount)/mbSize)
 }
 
 // CreateASCIIHighQuality creates a high-quality ASCII representation.

cmd/onvif-cli/main.go

@@ -690,7 +690,6 @@ func (c *CLI) tryRTSPConnection(streamURI string) map[string]interface{} {
 	// Try to connect
 	conn, err := net.DialTimeout("tcp", hostPort, maxRetries*time.Second)
 	if err == nil {
-		//nolint:errcheck // Close error is not critical for connectivity check
 		_ = conn.Close()
 		details["reachable"] = true
 		details["port"] = strings.Split(hostPort, ":")[1]

cmd/onvif-diagnostics/main.go

@@ -1102,21 +1102,18 @@ func createTarGz(sourceDir, archivePath string) error {
 		return fmt.Errorf("failed to create archive file: %w", err)
 	}
 	defer func() {
-		//nolint:errcheck // Close error is not critical for cleanup
 		_ = archiveFile.Close()
 	}()
 
 	// Create gzip writer
 	gzWriter := gzip.NewWriter(archiveFile)
 	defer func() {
-		//nolint:errcheck // Close error is not critical for cleanup
 		_ = gzWriter.Close()
 	}()
 
 	// Create tar writer
 	tarWriter := tar.NewWriter(gzWriter)
 	defer func() {
-		//nolint:errcheck // Close error is not critical for cleanup
 		_ = tarWriter.Close()
 	}()
 
@@ -1156,7 +1153,6 @@ func createTarGz(sourceDir, archivePath string) error {
 				return fmt.Errorf("failed to open file: %w", err)
 			}
 			defer func() {
-				//nolint:errcheck // Close error is not critical for cleanup
 				_ = file.Close()
 			}()