Add GetScrapePortals endpoint and related service functionality

- Introduced the GetScrapePortals method in the AI pipeline handler to list document scraping portals supported by the Opplens AI service.
- Updated the service layer to include GetScrapePortals, which retrieves the portals from the client and handles errors appropriately.
- Enhanced the routes to register the new endpoint for retrieving scrape portals.
- Added a new error type for invalid date ranges in the document scraper, improving validation and error handling.

This update expands the AI pipeline capabilities, allowing for better management of document scraping portals within the tender management system.

internal/ai_pipeline/service.go

@@ -12,6 +12,7 @@ import (
 type Client interface {
 	ScrapeDocuments(ctx context.Context, reqBody ai_summarizer.ScrapeDocumentsRequest) (*ai_summarizer.ScrapeDocumentsResponse, error)
 	ScrapeDocumentsBatch(ctx context.Context, tenders []ai_summarizer.TenderRef) (*ai_summarizer.BatchAcceptedResponse, error)
+	GetScrapePortals(ctx context.Context) (*ai_summarizer.ScrapePortalsResponse, error)
 	TriggerSummarizeBatch(ctx context.Context, tenders []ai_summarizer.TenderRef) (*ai_summarizer.BatchAcceptedResponse, error)
 	TriggerTranslateBatch(ctx context.Context, tenders []ai_summarizer.TenderRef, languages []string) (*ai_summarizer.BatchAcceptedResponse, error)
 	PipelineSync(ctx context.Context) (*ai_summarizer.PipelineSyncResponse, error)
@@ -31,6 +32,7 @@ type Client interface {
 type Service interface {
 	ScrapeDocuments(ctx context.Context, form ScrapeDocumentsForm) (*ai_summarizer.ScrapeDocumentsResponse, error)
 	ScrapeDocumentsBatch(ctx context.Context, form TenderBatchForm) (*ai_summarizer.BatchAcceptedResponse, error)
+	GetScrapePortals(ctx context.Context) (*ai_summarizer.ScrapePortalsResponse, error)
 	SummarizeBatch(ctx context.Context, form TenderBatchForm) (*ai_summarizer.BatchAcceptedResponse, error)
 	TranslateBatch(ctx context.Context, form TranslateBatchForm) (*ai_summarizer.BatchAcceptedResponse, error)
 	Sync(ctx context.Context) (*ai_summarizer.PipelineSyncResponse, error)
@@ -128,6 +130,24 @@ func (s *service) ScrapeDocumentsBatch(ctx context.Context, form TenderBatchForm
 	return resp, nil
 }
 
+func (s *service) GetScrapePortals(ctx context.Context) (*ai_summarizer.ScrapePortalsResponse, error) {
+	if err := s.requireClient(); err != nil {
+		return nil, err
+	}
+
+	s.logger.Info("Admin get scrape portals requested", map[string]interface{}{})
+
+	resp, err := s.client.GetScrapePortals(ctx)
+	if err != nil {
+		s.logger.Error("Admin get scrape portals failed", map[string]interface{}{
+			"error": err.Error(),
+		})
+		return nil, fmt.Errorf("get scrape portals failed: %w", err)
+	}
+
+	return resp, nil
+}
+
 func (s *service) SummarizeBatch(ctx context.Context, form TenderBatchForm) (*ai_summarizer.BatchAcceptedResponse, error) {
 	if err := s.requireClient(); err != nil {
 		return nil, err