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/worker/bootstrap/bootstrap.go

@@ -196,6 +196,7 @@ func InitWorker(config Config, mongoManager *mongo.ConnectionManager, appLogger
 	// Initialize translation backfill worker for configured languages
 	if aiClient != nil {
 		targetLanguages := parseTranslationLanguages(config.AISummarizer)
+		translationSuccessCounter := mongo.NewCounter(mongoManager)
 		scheduler.AddJob(schedule.Job{
 			Name: "Tender Translation Worker Job",
 			Func: func() {
@@ -205,6 +206,7 @@ func InitWorker(config Config, mongoManager *mongo.ConnectionManager, appLogger
 					tenderRepo,
 					aiClient,
 					aiStorage,
+					translationSuccessCounter,
 					targetLanguages,
 					config.Worker.TranslationBatchSize,
 				)
@@ -247,17 +249,19 @@ func InitWorker(config Config, mongoManager *mongo.ConnectionManager, appLogger
 }
 
 // InitAISummarizerClient initializes the AI summarizer HTTP client used by worker jobs.
-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, translation worker 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,
+		APIBaseURL:              conf.APIBaseURL,
+		APITimeout:              conf.APITimeout,
+		APIRetryCount:           conf.APIRetryCount,
+		APIRetryDelay:           conf.APIRetryDelay,
+		OnSuccessfulTranslation: mongo.AITranslationSuccessCallback(translationCounter),
 	}
 
 	client, err := ai_summarizer.NewClient(cfg, log)