fix(sla): freeze misses after resolution

script/backfill_applied_sla_completed_at.rb

@@ -0,0 +1,30 @@
+# Backfill applied_slas.completed_at from conversation resolution reporting events.
+#
+# Account-scoped dry run:
+#   ACCOUNT_ID=168154 bundle exec rails runner script/backfill_applied_sla_completed_at.rb
+#
+# Account-scoped apply:
+#   ACCOUNT_ID=168154 APPLY=true bundle exec rails runner script/backfill_applied_sla_completed_at.rb
+#
+# Explicit global apply with resume controls:
+#   ALL_ACCOUNTS=true APPLY=true BATCH_SIZE=500 AFTER_ID=0 \
+#     bundle exec rails runner script/backfill_applied_sla_completed_at.rb
+
+begin
+  account_id = Integer(ENV.fetch('ACCOUNT_ID'), 10) if ENV['ACCOUNT_ID'].present?
+  all_accounts = ENV['ALL_ACCOUNTS'] == 'true'
+  apply = ENV['APPLY'] == 'true'
+  batch_size = Integer(ENV.fetch('BATCH_SIZE', Sla::BackfillAppliedSlaCompletedAtService::DEFAULT_BATCH_SIZE.to_s), 10)
+  after_id = Integer(ENV.fetch('AFTER_ID', '0'), 10)
+
+  Sla::BackfillAppliedSlaCompletedAtService.new(
+    account_id: account_id,
+    all_accounts: all_accounts,
+    apply: apply,
+    batch_size: batch_size,
+    after_id: after_id
+  ).perform
+rescue ArgumentError, ActiveRecord::RecordNotFound => e
+  warn "Backfill aborted: #{e.message}"
+  exit 1
+end