Fix error when encountering invalid pinned posts (#17964)

app/services/activitypub/fetch_featured_collection_service.rb

@@ -22,9 +22,19 @@ class ActivityPub::FetchFeaturedCollectionService < BaseService
   private
 
   def process_items(items)
-    status_ids = items.map { |item| value_or_id(item) }
-                      .filter_map { |uri| ActivityPub::FetchRemoteStatusService.new.call(uri, on_behalf_of: local_follower) unless ActivityPub::TagManager.instance.local_uri?(uri) }
-                      .filter_map { |status| status.id if status.account_id == @account.id }
+    status_ids = items.filter_map do |item|
+      uri = value_or_id(item)
+      next if ActivityPub::TagManager.instance.local_uri?(uri)
+
+      status = ActivityPub::FetchRemoteStatusService.new.call(uri, on_behalf_of: local_follower)
+      next unless status.account_id == @account.id
+
+      status.id
+    rescue ActiveRecord::RecordInvalid => e
+      Rails.logger.debug "Invalid pinned status #{uri}: #{e.message}"
+      nil
+    end
+
     to_remove = []
     to_add    = status_ids