Add script to reindex stale search records (#2843)

The data import path (Account::DataTransfer) uses insert_all! which
bypasses ActiveRecord callbacks, so imported cards and comments never
get search records created and are invisible to search and card-table
filtering.

This script reindexes all published cards and comments created before
a cutoff date (default 2026-04-01). The reindex method is an upsert
so already-indexed records get a harmless update.

Usage:
  bin/rails runner script/maintenance/reindex_stale_search_records.rb
  bin/rails runner script/maintenance/reindex_stale_search_records.rb 2026-01-01

script/maintenance/reindex_stale_search_records.rb

@@ -0,0 +1,39 @@
+# Reindex cards and comments that may be missing from the search index.
+#
+# The data import path (Account::DataTransfer) uses insert_all! which bypasses
+# ActiveRecord callbacks, so imported cards and comments never get search records
+# created. This script reindexes cards and comments created before a cutoff date.
+#
+# Usage:
+#   bin/rails runner script/maintenance/reindex_stale_search_records.rb              # default cutoff: 2025-11-13
+#   bin/rails runner script/maintenance/reindex_stale_search_records.rb 2026-01-01   # custom cutoff
+
+cutoff = Date.parse(ARGV[0] || "2025-11-13")
+
+puts "Reindexing cards and comments created before #{cutoff}..."
+
+cards = Card.published.where("created_at < ?", cutoff).includes(:rich_text_description)
+card_count = cards.count
+puts "Found #{card_count} cards to reindex"
+
+reindexed_cards = 0
+cards.find_each do |card|
+  card.reindex
+  reindexed_cards += 1
+  print "\rCards: #{reindexed_cards}/#{card_count}" if reindexed_cards % 100 == 0
+end
+puts "\rCards: #{reindexed_cards}/#{card_count}"
+
+comments = Comment.joins(:card).merge(Card.published).where("comments.created_at < ?", cutoff).includes(:rich_text_body, :card)
+comment_count = comments.count
+puts "Found #{comment_count} comments to reindex"
+
+reindexed_comments = 0
+comments.find_each do |comment|
+  comment.reindex
+  reindexed_comments += 1
+  print "\rComments: #{reindexed_comments}/#{comment_count}" if reindexed_comments % 100 == 0
+end
+puts "\rComments: #{reindexed_comments}/#{comment_count}"
+
+puts "Done! Reindexed #{reindexed_cards} cards and #{reindexed_comments} comments."