feat: add historical data management

server/migrations/000014_history_anonymization.up.sql

@@ -0,0 +1,6 @@
+ALTER TABLE queue_tickets
+    ADD COLUMN history_anonymized_at timestamptz;
+
+CREATE INDEX queue_tickets_history_anonymized_idx
+    ON queue_tickets (history_anonymized_at, id)
+    WHERE history_anonymized_at IS NULL;