updated s3_key name to icon_hash

pipeline/03_icon_download/download.go

@@ -37,22 +37,22 @@ func processIcon(icon IconRow, cfg Config) DownloadResult {
 
 	// Compute SHA-256 for content-addressed storage
 	hash := sha256.Sum256(data)
-	s3Key := hex.EncodeToString(hash[:])
+	iconHash := hex.EncodeToString(hash[:])
 
 	// Write to disk (skip if already exists — dedup)
 	dedup := false
 	if !cfg.DryRun {
-		if iconExists(s3Key) {
+		if iconExists(iconHash) {
 			dedup = true
 		} else {
-			if err := iconWrite(s3Key, data); err != nil {
+			if err := iconWrite(iconHash, data); err != nil {
 				return DownloadResult{Err: fmt.Sprintf("disk write: %v", err), ErrType: "other"}
 			}
 		}
 	}
 
 	return DownloadResult{
-		S3Key:       s3Key,
+		IconHash:       iconHash,
 		ContentType: contentType,
 		Width:       width,
 		Height:      height,