update

config.yaml

···
   scan_interval: "30m"
   timeout: "30s"
   workers: 20
-  recheck_interval: "30m"
+  recheck_interval: "1.5h"
   scan_retention: 3
 
 api:

internal/api/handlers.go

···
 		if pds.IPInfo.ASN > 0 {
 			response["asn"] = pds.IPInfo.ASN
 		}
+		if pds.IPInfo.IsDatacenter {
+			response["is_datacenter"] = pds.IPInfo.IsDatacenter
+		}
 	}
 
 	return response

internal/storage/postgres.go

···
 			argIdx++
 		}
 
-		// NEW: Filter for stale endpoints only
+		// FIXED: Filter for stale endpoints only
 		if filter.OnlyStale && filter.RecheckInterval > 0 {
-			query += fmt.Sprintf(" AND (last_checked IS NULL OR last_checked < NOW() - INTERVAL '%d seconds')", int(filter.RecheckInterval.Seconds()))
+			// Calculate cutoff time in UTC (Go side, not PostgreSQL side)
+			cutoffTime := time.Now().UTC().Add(-filter.RecheckInterval)
+			query += fmt.Sprintf(" AND (last_checked IS NULL OR last_checked < $%d)", argIdx)
+			args = append(args, cutoffTime)
+			argIdx++
 		}
 	}