Add cache staleness check for recommendation page

- Introduced a new method `isRecommendedPageCacheStale` in the `tenderService` to determine if the cached recommendations for a company are outdated based on the count of cached recommendations and the latest AI recommendations.
- Updated the `recommendFromPageCache` method to utilize the new cache staleness check, ensuring that outdated caches are not used for recommendations.
- This enhancement improves the accuracy of recommendations by ensuring that users receive the most up-to-date information, thereby enhancing the overall user experience in the tender recommendation service.

internal/tender/recommendation_page_cache.go

@@ -201,6 +201,20 @@ func (s *tenderService) buildAllRankedRecommendations(
 	return out, nil
 }
 
+func (s *tenderService) isRecommendedPageCacheStale(ctx context.Context, companyID string, cachedCount int) bool {
+	companyID = strings.TrimSpace(companyID)
+	if companyID == "" || cachedCount == 0 {
+		return false
+	}
+
+	recommendations, err := s.companyService.GetAIRecommendations(ctx, companyID)
+	if err != nil || len(recommendations) == 0 {
+		return false
+	}
+
+	return cachedCount < len(recommendations)
+}
+
 func (s *tenderService) recommendFromPageCache(
 	ctx context.Context,
 	companyID string,
@@ -223,6 +237,10 @@ func (s *tenderService) recommendFromPageCache(
 		return nil, false
 	}
 
+	if len(companyIDs) == 0 && s.isRecommendedPageCacheStale(ctx, companyID, len(cached)) {
+		return nil, false
+	}
+
 	excluded, excludedByCompany, err := s.loadRecommendationExclusions(ctx, form, companyID, companyIDs)
 	if err != nil {
 		return nil, false