fix(log): change log level from error to debug when we failed to dele…

…te a key in conntrack (#916)

# Description

In a high connection churn environment, this log entry can clutter
Retina’s logs without providing actionable insights. Since it does not
impact Retina’s operation, it is safe to reduce its logging level to
debug.

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pkg/plugin/conntrack/conntrack_linux.go

@@ -128,7 +128,8 @@ func (ct *Conntrack) Run(ctx context.Context) error {
 			// Delete the conntrack entries
 			for _, key := range keysToDelete {
 				if err := ct.ctMap.Delete(key); err != nil {
-					ct.l.Error("Delete failed", zap.Error(err))
+					// Should only happen in a high connection churn scenario
+					ct.l.Debug("Delete failed", zap.Error(err))
 				} else {
 					entriesDeleted++
 				}