refactor: Replace time and ID generation helpers with centralized id package utilities

- Replace getCurrentTime() calls with id.GetCurrentTime() in pricing_integration.go and pricing_service.go
- Replace generateRuleID() with id.GenerateRuleID() in pricing rule creation
- Replace generateEventID() with id.GenerateEventID() in tenant middleware
- Remove local helper functions: generateRuleID, getCurrentTime, generateEventID, generateRandomString, getCurrentTimestamp
- Remove unused time package imports

apps/carrier-connector/internal/smdp/selection_algorithm.go

@@ -181,3 +181,19 @@ func (sa *SelectionAlgorithm) PredictPerformance(carrierID string, criteria *Sel
 func (sa *SelectionAlgorithm) GetCarrierPerformance(carrierID string) *PerformanceMetrics {
 	return sa.mlModel.GetCarrierPerformance(carrierID)
 }
+
+// getHighestPriorityCarrier returns the carrier with the highest priority
+func (sa *SelectionAlgorithm) getHighestPriorityCarrier(carriers []*Carrier) *Carrier {
+	if len(carriers) == 0 {
+		return nil
+	}
+
+	highestPriority := carriers[0]
+	for _, carrier := range carriers {
+		if carrier.Priority > highestPriority.Priority {
+			highestPriority = carrier
+		}
+	}
+
+	return highestPriority
+}