fix: address code review findings

internal/routing/graph.go

@@ -418,21 +418,21 @@ func (g *Graph) FindRoute(originID, destID string, opts SearchOptions, closedSta
 
 			newDurationWithMCT := newDuration + transferTime
 
-			// Check if we've visited this node with fewer transfers
-			visKey := nextNode.ID
-			if existingTransfers, ok := visited[visKey]; ok {
-				if current.transfers+1 > existingTransfers {
-					// Already visited this node with fewer transfers, skip
-					continue
-				}
-			}
-			visited[visKey] = current.transfers + 1
-
 			newTransfers := current.transfers
 			if edge.IsTransfer {
 				newTransfers++
 			}
 
+			// Check if we've visited this node with fewer transfers
+			visKey := nextNode.ID
+			if existingTransfers, ok := visited[visKey]; ok {
+				if newTransfers > existingTransfers {
+					// Already visited this node with fewer transfers, skip
+					continue
+				}
+			}
+			visited[visKey] = newTransfers
+
 			// Build new itinerary legs
 			newLegs := make([]RouteLeg, len(current.itinerary.Legs)+1)
 			copy(newLegs, current.itinerary.Legs)
@@ -831,27 +831,6 @@ func (g *Graph) ApplyMCT(itinerary *Itinerary, mctBase int) *Itinerary {
 
 		// Add the MCT to the total duration (as waiting time at transfer)
 		totalMCT += mct
-	}
-
-	// Update leg durations to include MCT for transfer legs
-	for i := 1; i < len(adjustedLegs); i++ {
-		prevLeg := &adjustedLegs[i-1]
-		currLeg := &adjustedLegs[i]
-
-		// Determine MCT based on node types and transfer kinds
-		mct := mctBase
-
-		// Reduce MCT for city hub transfers (the transfer point node is a city)
-		// The transfer point is the destination of the previous leg / start of current leg
-		transferPoint := prevLeg.To // = currLeg.From
-		if transferPoint.Type == NodeTypeCity {
-			mct = mctBase / 2 // 30 min -> 15 min for city hub transfers
-		}
-
-		// Increase MCT for mode changes (different transport types)
-		if prevLeg.Transport != currLeg.Transport {
-			mct = mctBase + 600 // 30 min + 10 min for mode change
-		}
 
 		// Add MCT to the current leg's duration (transfer wait time)
 		adjustedLegs[i].Duration += mct

internal/yandex/client.go

@@ -170,7 +170,6 @@ func (c *Client) Do(ctx context.Context, method, path string, query map[string]s
 		}
 	}
 
-	c.circuitBreaker.recordFailure() // final failure
 	c.metrics.RecordCircuitBreakerTrip()
 	return nil, err
 }
@@ -299,7 +298,7 @@ func buildURL(path string, query map[string]string) string {
 	return u
 }
 
-// --- Token Bucket Rate Limitter ---
+// --- Token Bucket Rate Limiter ---
 
 func newTokenBucket(capacity, perSeconds int) *tokenBucket {
 	return &tokenBucket{
@@ -322,7 +321,7 @@ func (tb *tokenBucket) acquire() error {
 		return nil
 	}
 
-	return fmt.Errorf("rate limit: rate exceeded (%.1f TPS configured)", float64(tb.refillPerSec)/float64(time.Second))
+	return fmt.Errorf("rate limit: rate exceeded (%.1f TPS configured)", float64(tb.refillPerSec))
 }
 
 func (tb *tokenBucket) refill(now time.Time) {