fix: filter derived Cloudinary URLs from migration

Skip coverImage.derived[], videoCloudinary.derived[], and other
sub-fields of cloudinary.asset objects that contain transformed
URL variants. These don't need separate uploads since the entire
cloudinary.asset object gets replaced.

Reduces unique URLs from 6,985 to 282 base assets.

Co-authored-by: builder <builder@miriad.systems>

Author: Miriad

scripts/migration/migrate.mjs

@@ -316,6 +316,15 @@ function findCloudinaryRefs(obj, currentPath = '') {
 
   if (typeof obj === 'string') {
     if (containsCloudinaryRef(obj)) {
+      // Skip URLs that are inside cloudinary.asset sub-fields (derived, url, secure_url)
+      // These will be replaced when the parent cloudinary.asset object is swapped out
+      const skipPatterns = ['.derived[', '.secure_url', '.url'];
+      const isSubField = skipPatterns.some((p) => currentPath.includes(p)) &&
+        (currentPath.includes('coverImage') || currentPath.includes('videoCloudinary') || currentPath.includes('ogImage'));
+      if (isSubField) {
+        return results;
+      }
+
       const urls = extractCloudinaryUrls(obj);
       const isFullUrl = obj.trim().startsWith('http') && !obj.includes(' ') && urls.length === 1;