feat(storage): refactor audit and notification with OperationHelper (#825)

* improve code for audit

* improve code ecfs.rs

* improve code

* improve code for ecfs.rs

* feat(storage): refactor audit and notification with OperationHelper

This commit introduces a significant refactoring of the audit logging and event notification mechanisms within `ecfs.rs`.

The core of this change is the new `OperationHelper` struct, which encapsulates and simplifies the logic for both concerns. It replaces the previous `AuditHelper` and manual event dispatching.

Key improvements include:

- **Unified Handling**: `OperationHelper` manages both audit and notification builders, providing a single, consistent entry point for S3 operations.
- **RAII for Automation**: By leveraging the `Drop` trait, the helper automatically dispatches logs and notifications when it goes out of scope. This simplifies S3 method implementations and ensures cleanup even on early returns.
- **Fluent API**: A builder-like pattern with methods such as `.object()`, `.version_id()`, and `.suppress_event()` makes the code more readable and expressive.
- **Context-Aware Logic**: The helper's `.complete()` method intelligently populates log details based on the operation's `S3Result` and only triggers notifications on success.
- **Modular Design**: All helper logic is now isolated in `rustfs/src/storage/helper.rs`, improving separation of concerns and making `ecfs.rs` cleaner.

This refactoring significantly enhances code clarity, reduces boilerplate, and improves the robustness of logging and notification handling across the storage layer.

* fix

* fix

* fix

* fix

* fix

* fix

* fix

* improve code for audit and notify

* fix

* fix

* fix

crates/audit/tests/performance_test.rs

@@ -73,7 +73,7 @@ async fn test_concurrent_target_creation() {
 
     // Verify it fails with expected error (server not initialized)
     match result {
-        Err(AuditError::ServerNotInitialized(_)) => {
+        Err(AuditError::StorageNotAvailable(_)) => {
             // Expected in test environment
         }
         Err(e) => {
@@ -103,17 +103,17 @@ async fn test_audit_log_dispatch_performance() {
     use std::collections::HashMap;
     let id = 1;
 
-    let mut req_header = HashMap::new();
+    let mut req_header = hashbrown::HashMap::new();
     req_header.insert("authorization".to_string(), format!("Bearer test-token-{id}"));
     req_header.insert("content-type".to_string(), "application/octet-stream".to_string());
 
-    let mut resp_header = HashMap::new();
+    let mut resp_header = hashbrown::HashMap::new();
     resp_header.insert("x-response".to_string(), "ok".to_string());
 
-    let mut tags = HashMap::new();
+    let mut tags = hashbrown::HashMap::new();
     tags.insert(format!("tag-{id}"), json!("sample"));
 
-    let mut req_query = HashMap::new();
+    let mut req_query = hashbrown::HashMap::new();
     req_query.insert("id".to_string(), id.to_string());
 
     let api_details = ApiDetails {