fix: address code review findings

internal/routing/search_cache.go

@@ -29,8 +29,12 @@ func NewSearchCacheService(cacheStore cache.Cache, yclient *yandex.Client, m *me
 // SearchWithCache performs a route search with caching support.
 // It uses the cache-aside pattern: try cache first, then Yandex API, then write back to cache.
 func (s *SearchCacheService) SearchWithCache(ctx context.Context, from, to, date string, opts SearchOptions) (*yandex.Response, error) {
-	// Generate cache key
-	searchKey := cache.GetSearchKey(from, to, date)
+	// Generate cache key including far-term flag to distinguish near-term vs far-term searches
+	farTermFlag := "near"
+	if opts.FarTerm {
+		farTermFlag = "far"
+	}
+	searchKey := cache.GetSearchKeyWithFarTerm(from, to, date, farTermFlag)
 
 	// Try to get from cache first
 	fetchFunc := func() ([]byte, error) {