Update MinIO bucket configuration and enhance dashboard service caching

- Changed the default MinIO bucket name from "opplens-documents" to "opplens" across multiple configuration files.
- Introduced caching for dashboard statistics in the service layer to improve performance and reduce redundant data fetching.
- Implemented a mutex for thread-safe access to cached statistics, ensuring data integrity during concurrent requests.

This update streamlines the configuration for the AI summarizer and optimizes the dashboard service, enhancing overall system efficiency.

pkg/mongo/counter.go

@@ -104,14 +104,47 @@ func (c *Counter) GetDailyCounts(ctx context.Context, startDay, endDay time.Time
 		return map[string]int64{}, nil
 	}
 
-	counts := make(map[string]int64)
+	keys := make([]string, 0)
+	dates := make([]string, 0)
 	for day := startDay; !day.After(endDay); day = day.AddDate(0, 0, 1) {
-		date := day.Format("2006-01-02")
-		value, err := c.Get(ctx, AITranslationSuccessDailyCounterKey(day))
-		if err != nil {
-			return nil, err
+		dates = append(dates, day.Format("2006-01-02"))
+		keys = append(keys, AITranslationSuccessDailyCounterKey(day))
+	}
+
+	counts := make(map[string]int64, len(dates))
+	for _, date := range dates {
+		counts[date] = 0
+	}
+
+	cursor, err := c.mongo.GetCollection(metricsCountersCollection).Find(ctx, bson.M{
+		"_id": bson.M{"$in": keys},
+	})
+	if err != nil {
+		return nil, fmt.Errorf("mongo counter get daily counts: %w", err)
+	}
+	defer cursor.Close(ctx)
+
+	keyToDate := make(map[string]string, len(keys))
+	for i, key := range keys {
+		keyToDate[key] = dates[i]
+	}
+
+	for cursor.Next(ctx) {
+		var doc struct {
+			ID    string `bson:"_id"`
+			Count int64  `bson:"count"`
 		}
-		counts[date] = value
+		if err := cursor.Decode(&doc); err != nil {
+			return nil, fmt.Errorf("mongo counter decode daily count: %w", err)
+		}
+		date, ok := keyToDate[doc.ID]
+		if !ok {
+			continue
+		}
+		counts[date] = doc.Count
+	}
+	if err := cursor.Err(); err != nil {
+		return nil, fmt.Errorf("mongo counter iterate daily counts: %w", err)
 	}
 
 	return counts, nil