data growth features

.env.example

@@ -21,6 +21,9 @@ PRICE_UPDATE_INTERVAL_MINUTES=60
 HASHTAG_ACTIVE_HOURS=24
 # Max pagination pages to fetch when counting posts (default: 5 = up to 200 posts)
 MAX_PAGES_PER_HASHTAG=5
+# Price history retention: days to keep for active hashtags, hours for inactive ones
+PRICE_HISTORY_ACTIVE_DAYS=7
+PRICE_HISTORY_INACTIVE_HOURS=24
 
 # Initial admin user — only used by `npm run db:seed`, not the running app.
 # Pass these at seed time: docker exec -e ADMIN_USERNAME=x -e ADMIN_PASSWORD=y <container> npm run db:seed