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.

cmd/web/bootstrap/bootstrap.go

@@ -290,23 +290,25 @@ func InitFileStore(mongoManager *mongo.ConnectionManager, log logger.Logger) (*f
 }
 
 // InitAISummarizerClient initializes the AI summarizer HTTP client for on-demand summarization
-func InitAISummarizerClient(conf AISummarizerConfig, log logger.Logger) *ai_summarizer.Client {
+func InitAISummarizerClient(conf AISummarizerConfig, mongoManager *mongo.ConnectionManager, log logger.Logger) *ai_summarizer.Client {
 	if conf.APIBaseURL == "" {
 		log.Warn("AI Summarizer API base URL not configured, on-demand summarization will be unavailable", map[string]interface{}{})
 		return nil
 	}
 
+	translationCounter := mongo.NewCounter(mongoManager)
 	cfg := &ai_summarizer.Config{
-		APIBaseURL:     conf.APIBaseURL,
-		APITimeout:     conf.APITimeout,
-		APIRetryCount:  conf.APIRetryCount,
-		APIRetryDelay:  conf.APIRetryDelay,
-		MinioEndpoint:  conf.MinioEndpoint,
-		MinioAccessKey: conf.MinioAccessKey,
-		MinioSecretKey: conf.MinioSecretKey,
-		MinioUseSSL:    conf.MinioUseSSL,
-		MinioRegion:    conf.MinioRegion,
-		MinioBucket:    conf.MinioBucket,
+		APIBaseURL:              conf.APIBaseURL,
+		APITimeout:              conf.APITimeout,
+		APIRetryCount:           conf.APIRetryCount,
+		APIRetryDelay:           conf.APIRetryDelay,
+		MinioEndpoint:           conf.MinioEndpoint,
+		MinioAccessKey:          conf.MinioAccessKey,
+		MinioSecretKey:          conf.MinioSecretKey,
+		MinioUseSSL:             conf.MinioUseSSL,
+		MinioRegion:             conf.MinioRegion,
+		MinioBucket:             conf.MinioBucket,
+		OnSuccessfulTranslation: mongo.AITranslationSuccessCallback(translationCounter),
 	}
 
 	client, err := ai_summarizer.NewClient(cfg, log)