Fix noinlineerr findings: internal/snapshot (refs #61)

internal/snapshot/manifest.go

@@ -35,7 +35,9 @@ func DecodeManifest(r io.Reader) (*Manifest, error) {
 
 	// Decode JSON manifest
 	var manifest Manifest
-	if err := json.NewDecoder(zr).Decode(&manifest); err != nil {
+
+	err = json.NewDecoder(zr).Decode(&manifest)
+	if err != nil {
 		return nil, fmt.Errorf("decoding manifest: %w", err)
 	}
 
@@ -58,13 +60,15 @@ func EncodeManifest(manifest *Manifest, compressionLevel int) ([]byte, error) {
 		return nil, fmt.Errorf("creating zstd writer: %w", err)
 	}
 
-	if _, err := writer.Write(jsonData); err != nil {
+	_, err = writer.Write(jsonData)
+	if err != nil {
 		_ = writer.Close()
 
 		return nil, fmt.Errorf("writing compressed data: %w", err)
 	}
 
-	if err := writer.Close(); err != nil {
+	err = writer.Close()
+	if err != nil {
 		return nil, fmt.Errorf("closing zstd writer: %w", err)
 	}