[Optimization] Enhance obs module telemetry.rs with environment-aware logging and production security (#539)

* Initial plan

* Implement environment-aware logging with production stdout auto-disable

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

* add mimalloc crate

* fix

* improve code

---------

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/config/src/observability/config.rs

@@ -33,3 +33,47 @@ pub const ENV_AUDIT_LOGGER_QUEUE_CAPACITY: &str = "RUSTFS_AUDIT_LOGGER_QUEUE_CAP
 
 // Default values for observability configuration
 pub const DEFAULT_AUDIT_LOGGER_QUEUE_CAPACITY: usize = 10000;
+
+/// Default values for observability configuration
+// ### Supported Environment Values
+// - `production` - Secure file-only logging
+// - `development` - Full debugging with stdout
+// - `test` - Test environment with stdout support
+// - `staging` - Staging environment with stdout support
+pub const DEFAULT_OBS_ENVIRONMENT_PRODUCTION: &str = "production";
+pub const DEFAULT_OBS_ENVIRONMENT_DEVELOPMENT: &str = "development";
+pub const DEFAULT_OBS_ENVIRONMENT_TEST: &str = "test";
+pub const DEFAULT_OBS_ENVIRONMENT_STAGING: &str = "staging";
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_env_keys() {
+        assert_eq!(ENV_OBS_ENDPOINT, "RUSTFS_OBS_ENDPOINT");
+        assert_eq!(ENV_OBS_USE_STDOUT, "RUSTFS_OBS_USE_STDOUT");
+        assert_eq!(ENV_OBS_SAMPLE_RATIO, "RUSTFS_OBS_SAMPLE_RATIO");
+        assert_eq!(ENV_OBS_METER_INTERVAL, "RUSTFS_OBS_METER_INTERVAL");
+        assert_eq!(ENV_OBS_SERVICE_NAME, "RUSTFS_OBS_SERVICE_NAME");
+        assert_eq!(ENV_OBS_SERVICE_VERSION, "RUSTFS_OBS_SERVICE_VERSION");
+        assert_eq!(ENV_OBS_ENVIRONMENT, "RUSTFS_OBS_ENVIRONMENT");
+        assert_eq!(ENV_OBS_LOGGER_LEVEL, "RUSTFS_OBS_LOGGER_LEVEL");
+        assert_eq!(ENV_OBS_LOCAL_LOGGING_ENABLED, "RUSTFS_OBS_LOCAL_LOGGING_ENABLED");
+        assert_eq!(ENV_OBS_LOG_DIRECTORY, "RUSTFS_OBS_LOG_DIRECTORY");
+        assert_eq!(ENV_OBS_LOG_FILENAME, "RUSTFS_OBS_LOG_FILENAME");
+        assert_eq!(ENV_OBS_LOG_ROTATION_SIZE_MB, "RUSTFS_OBS_LOG_ROTATION_SIZE_MB");
+        assert_eq!(ENV_OBS_LOG_ROTATION_TIME, "RUSTFS_OBS_LOG_ROTATION_TIME");
+        assert_eq!(ENV_OBS_LOG_KEEP_FILES, "RUSTFS_OBS_LOG_KEEP_FILES");
+        assert_eq!(ENV_AUDIT_LOGGER_QUEUE_CAPACITY, "RUSTFS_AUDIT_LOGGER_QUEUE_CAPACITY");
+    }
+
+    #[test]
+    fn test_default_values() {
+        assert_eq!(DEFAULT_AUDIT_LOGGER_QUEUE_CAPACITY, 10000);
+        assert_eq!(DEFAULT_OBS_ENVIRONMENT_PRODUCTION, "production");
+        assert_eq!(DEFAULT_OBS_ENVIRONMENT_DEVELOPMENT, "development");
+        assert_eq!(DEFAULT_OBS_ENVIRONMENT_TEST, "test");
+        assert_eq!(DEFAULT_OBS_ENVIRONMENT_STAGING, "staging");
+    }
+}