Fix KMS configuration synchronization across cluster nodes (#855)

* Initial plan

* Add KMS configuration persistence to cluster storage

Co-authored-by: houseme <4829346+houseme@users.noreply.github.com>

* Apply code formatting to KMS configuration changes

Co-authored-by: houseme <4829346+houseme@users.noreply.github.com>

* add comment

* fix fmt

* fix

* Fix overlapping dependabot cargo configurations

Co-authored-by: houseme <4829346+houseme@users.noreply.github.com>

* improve code for comment and replace  `Once_Cell` to `std::sync::OnceLock`

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: houseme <4829346+houseme@users.noreply.github.com>
Co-authored-by: houseme <housemecn@gmail.com>
Co-authored-by: loverustfs <155562731+loverustfs@users.noreply.github.com>

crates/utils/src/dirs.rs

@@ -16,6 +16,7 @@ use rustfs_config::{DEFAULT_LOG_DIR, DEFAULT_LOG_FILENAME};
 use std::env;
 use std::fs;
 use std::path::{Path, PathBuf};
+use tracing::debug;
 
 /// Get the absolute path to the current project
 ///
@@ -29,11 +30,12 @@ use std::path::{Path, PathBuf};
 /// # Returns
 /// - `Ok(PathBuf)`: The absolute path of the project that was successfully obtained.
 /// - `Err(String)`: Error message for the failed path.
+///
 pub fn get_project_root() -> Result<PathBuf, String> {
     // Try to get the project root directory through the CARGO_MANIFEST_DIR environment variable
     if let Ok(manifest_dir) = env::var("CARGO_MANIFEST_DIR") {
         let project_root = Path::new(&manifest_dir).to_path_buf();
-        println!("Get the project root directory with CARGO_MANIFEST_DIR:{}", project_root.display());
+        debug!("Get the project root directory with CARGO_MANIFEST_DIR:{}", project_root.display());
         return Ok(project_root);
     }
 
@@ -43,7 +45,7 @@ pub fn get_project_root() -> Result<PathBuf, String> {
         // Assume that the project root directory is in the parent directory of the parent directory of the executable path (usually target/debug or target/release)
         project_root.pop(); // Remove the executable file name
         project_root.pop(); // Remove target/debug or target/release
-        println!("Deduce the project root directory through current_exe:{}", project_root.display());
+        debug!("Deduce the project root directory through current_exe:{}", project_root.display());
         return Ok(project_root);
     }
 
@@ -51,7 +53,7 @@ pub fn get_project_root() -> Result<PathBuf, String> {
     if let Ok(mut current_dir) = env::current_dir() {
         // Assume that the project root directory is in the parent directory of the current working directory
         current_dir.pop();
-        println!("Deduce the project root directory through current_dir:{}", current_dir.display());
+        debug!("Deduce the project root directory through current_dir:{}", current_dir.display());
         return Ok(current_dir);
     }
 
@@ -61,12 +63,38 @@ pub fn get_project_root() -> Result<PathBuf, String> {
 
 /// Get the log directory as a string
 /// This function will try to find a writable log directory in the following order:
+///
+/// 1. Environment variables are specified
+/// 2. System temporary directory
+/// 3. User home directory
+/// 4. Current working directory
+/// 5. Relative path
+///
+/// # Arguments
+/// * `key` - The environment variable key to check for log directory
+///
+/// # Returns
+/// * `String` - The log directory path as a string
+///
 pub fn get_log_directory_to_string(key: &str) -> String {
     get_log_directory(key).to_string_lossy().to_string()
 }
 
 /// Get the log directory
 /// This function will try to find a writable log directory in the following order:
+///
+/// 1. Environment variables are specified
+/// 2. System temporary directory
+/// 3. User home directory
+/// 4. Current working directory
+/// 5. Relative path
+///
+/// # Arguments
+/// * `key` - The environment variable key to check for log directory
+///
+/// # Returns
+/// * `PathBuf` - The log directory path
+///
 pub fn get_log_directory(key: &str) -> PathBuf {
     // Environment variables are specified
     if let Ok(log_dir) = env::var(key) {