refactor: Replace interface{} with any and optimize slice operations

- Replace map[string]interface{} with map[string]any in UpdateCarrierMetrics
- Replace interface{} with any for GeneratedAt field in PricingEffectiveness struct
- Replace loop-based empty string checks with slices.Contains in ValidateConditions
- Replace range loop index initialization with range-only syntax in calculateAPIPerformance
- Add slices import for standard library slice utilities

apps/carrier-connector/internal/integration/carrier_config.go

@@ -109,7 +109,7 @@ func (r *GormCarrierRepository) SaveCarrier(ctx context.Context, carrier *smdp.C
 // UpdateCarrierMetrics updates carrier metrics
 func (r *GormCarrierRepository) UpdateCarrierMetrics(ctx context.Context, id string, metrics *smdp.CarrierMetrics) error {
 	// Persist metrics alongside the carrier record
-	updates := map[string]interface{}{
+	updates := map[string]any{
 		"updated_at": time.Now(),
 	}