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/ai_summarizer/config.go

@@ -26,7 +26,7 @@ type Config struct {
 	MinioSecretKey string        // MinIO secret access key
 	MinioUseSSL    bool          // Whether to use SSL for MinIO connection
 	MinioRegion    string        // MinIO region
-	MinioBucket    string        // MinIO bucket name (default: "opplens-documents")
+	MinioBucket    string        // MinIO bucket name (default: "opplens")
 	MinioTimeout   time.Duration // Timeout for MinIO operations
 }
 
@@ -37,7 +37,7 @@ func DefaultConfig() *Config {
 		APIRetryCount: 2,
 		APIRetryDelay: 3 * time.Second,
 
-		MinioBucket:  "opplens-documents",
+		MinioBucket:  "opplens",
 		MinioRegion:  "us-east-1",
 		MinioUseSSL:  false,
 		MinioTimeout: 30 * time.Second,