Refactor AI summarizer client initialization to include MongoDB manager and add statistics endpoint

- Updated `InitAISummarizerClient` to accept `mongoManager` for tracking translation success.
- Introduced new `Statistics` endpoint in the dashboard to fetch scraping and translation statistics.
- Enhanced `TranslationWorker` to utilize the new success counter for tracking successful translations.
- Added necessary data structures and query forms for statistics reporting.

This refactor improves the tracking of AI translation success and provides new insights through the dashboard statistics.

pkg/ai_summarizer/client.go

@@ -107,7 +107,7 @@ func (c *Client) FetchTranslationOnDemand(ctx context.Context, reqBody Translate
 			}
 		}
 
-		resp, err := c.doTranslatePost(ctx, url, jsonBody)
+		resp, err := c.doTranslatePost(ctx, url, jsonBody, reqBody.RequestSource)
 		if err != nil {
 			lastErr = err
 			c.logger.Error("AI translate request failed", map[string]interface{}{
@@ -216,7 +216,7 @@ func (c *Client) doPost(ctx context.Context, url string, jsonBody []byte) (*Summ
 }
 
 // doTranslatePost performs a single translation POST request and parses the response.
-func (c *Client) doTranslatePost(ctx context.Context, url string, jsonBody []byte) (*TranslateResponse, error) {
+func (c *Client) doTranslatePost(ctx context.Context, url string, jsonBody []byte, requestSource string) (*TranslateResponse, error) {
 	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(jsonBody))
 	if err != nil {
 		return nil, fmt.Errorf("ai_summarizer: failed to create translation request: %w", err)
@@ -253,6 +253,17 @@ func (c *Client) doTranslatePost(ctx context.Context, url string, jsonBody []byt
 		"language":              result.Language,
 	})
 
+	if c.config.OnSuccessfulTranslation != nil {
+		if err := c.config.OnSuccessfulTranslation(ctx, requestSource); err != nil {
+			c.logger.Warn("Failed to increment AI translation success counter", map[string]interface{}{
+				"notice_publication_id": result.NoticePublicationID,
+				"language":              result.Language,
+				"request_source":        requestSource,
+				"error":                 err.Error(),
+			})
+		}
+	}
+
 	return result, nil
 }