fix(purge): short first tick on all three purge timers so daily-recycled nodes still purge

src/ZB.MOM.WW.ScadaBridge.KpiHistory/KpiHistoryRecorderActor.cs

@@ -4,6 +4,7 @@ using Microsoft.Extensions.Logging;
 using ZB.MOM.WW.ScadaBridge.Commons.Entities.Kpi;
 using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Kpi;
 using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Repositories;
+using ZB.MOM.WW.ScadaBridge.Commons.Types;
 
 namespace ZB.MOM.WW.ScadaBridge.KpiHistory;
 
@@ -119,12 +120,15 @@ public class KpiHistoryRecorderActor : ReceiveActor, IWithTimers
             initialDelay: TimeSpan.FromSeconds(5),
             interval: _options.SampleInterval);
 
-        // The purge is daily and idempotent — no initial fast tick; the first sweep
-        // fires after a full PurgeInterval.
+        // The purge is idempotent, so it takes a short first tick (min(PurgeInterval, 5min)):
+        // scheduling the first sweep a full PurgeInterval out meant a node recycled more often
+        // than the interval (e.g. daily restart vs. daily cadence) would never purge
+        // (arch-review 04, S9). Fast test cadences (interval < 5min) are unchanged.
         Timers.StartPeriodicTimer(
             PurgeTimerKey,
             PurgeTick.Instance,
-            _options.PurgeInterval);
+            initialDelay: PurgeTimerSchedule.InitialDelay(_options.PurgeInterval),
+            interval: _options.PurgeInterval);
     }
 
     /// <inheritdoc />