Support ProblematicTimelineItem in trending feed

src/invidious/helpers/serialized_yt_data.cr

@@ -299,8 +299,11 @@ end
 # the rest of the (hopefully) successfully parsed item on a page.
 struct ProblematicTimelineItem
   property parse_exception : Exception
+  property id : String
 
-  def initialize(@parse_exception); end
+  def initialize(@parse_exception)
+    @id = Random.new.hex(8)
+  end
 
   def to_json(locale : String?, json : JSON::Builder)
     json.object do

src/invidious/trending.cr

@@ -31,12 +31,12 @@ def fetch_trending(trending_type, region, locale)
       # See: https://github.com/iv-org/invidious/issues/2989
       next if (itm.contents.size < 24 && deduplicate)
 
-      extracted.concat extract_category(itm)
+      extracted.concat itm.contents.select(SearchItem)
     else
       extracted << itm
     end
   end
 
   # Deduplicate items before returning results
-  return extracted.select(SearchVideo).uniq!(&.id), plid
+  return extracted.select(SearchVideo | ProblematicTimelineItem).uniq!(&.id), plid
 end