[i886] - Fix collection thumbnail fallback logic in Hyrax::ThumbnailP…

…athServiceDecorator

The default work thumbnail was displaying even though the default collection thumbnail was set.

Issue:
- scientist-softserv/adventist_knapsack#886

- Updated #call method to use default_collection_image for collection resources when thumbnail_id is blank.
- Ensures collections without specific thumbnails use the site-wide default collection image instead of the default work image.
- Improved fallback logic to distinguish between collections and works, avoiding issues with collections displaying the work default image.

app/services/hyrax/thumbnail_path_service_decorator.rb

@@ -10,10 +10,14 @@ def call(object)
       collection_thumbnail = CollectionBrandingInfo.where(collection_id: object.id.to_s, role: "thumbnail").first
       return collection_thumbnail.local_path.gsub(Hyrax.config.branding_path.to_s, '/branding') if collection_thumbnail
 
-      return default_image if object.try(:thumbnail_id).blank?
+      if object.try(:thumbnail_id).blank?
+        return default_collection_image if object.try(:collection?)
+        return default_image
+      end
 
       thumb = fetch_thumbnail(object)
       return default_collection_image unless thumb
+
       return call(thumb) unless thumb.file_set?
       if audio?(thumb)
         audio_image

config/environments/production.rb

@@ -50,7 +50,7 @@
   config.force_ssl = true
   config.ssl_options = {
     redirect: {
-      exclude: -> request { request.path == '/healthz' }
+      exclude: ->(request) { request.path == '/healthz' }
     }
   }
   # Use the lowest log level to ensure availability of diagnostic information