feat: migrate to reed-solomon-simd only implementation

- Remove reed-solomon-erasure dependency and all related code
- Simplify ReedSolomonEncoder from enum to struct with SIMD-only implementation
- Eliminate all conditional compilation (#[cfg(feature = ...)])
- Add instance caching with RwLock-based encoder/decoder reuse
- Implement reset mechanism to avoid unnecessary allocations
- Ensure thread safety with proper cache management
- Update documentation and benchmark scripts for SIMD-only approach
- Apply code formatting across all files

Breaking Changes:
- Removes support for reed-solomon-erasure feature flag
- API remains compatible but implementation is now SIMD-only

Performance Impact:
- Improved encoding/decoding performance through SIMD optimization
- Reduced memory allocations via instance caching
- Enhanced thread safety and concurrency support

crates/obs/src/metrics/audit.rs

@@ -1,7 +1,7 @@
 /// audit related metric descriptors
 ///
 /// This module contains the metric descriptors for the audit subsystem.
-use crate::metrics::{new_counter_md, new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 
 const TARGET_ID: &str = "target_id";
 

crates/obs/src/metrics/bucket.rs

@@ -1,5 +1,5 @@
 /// bucket level s3 metric descriptor
-use crate::metrics::{new_counter_md, new_gauge_md, new_histogram_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, new_histogram_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref BUCKET_API_TRAFFIC_SENT_BYTES_MD: MetricDescriptor =

crates/obs/src/metrics/bucket_replication.rs

@@ -1,5 +1,5 @@
 /// Bucket copy metric descriptor
-use crate::metrics::{new_counter_md, new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 
 /// Bucket level replication metric descriptor
 pub const BUCKET_L: &str = "bucket";

crates/obs/src/metrics/cluster_config.rs

@@ -1,5 +1,5 @@
 /// Metric descriptors related to cluster configuration
-use crate::metrics::{new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref CONFIG_RRS_PARITY_MD: MetricDescriptor =

crates/obs/src/metrics/cluster_erasure_set.rs

@@ -1,5 +1,5 @@
 /// Erasure code set related metric descriptors
-use crate::metrics::{new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 
 /// The label for the pool ID
 pub const POOL_ID_L: &str = "pool_id";

crates/obs/src/metrics/cluster_health.rs

@@ -1,5 +1,5 @@
 /// Cluster health-related metric descriptors
-use crate::metrics::{new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref HEALTH_DRIVES_OFFLINE_COUNT_MD: MetricDescriptor =

crates/obs/src/metrics/cluster_iam.rs

@@ -1,5 +1,5 @@
 /// IAM related metric descriptors
-use crate::metrics::{new_counter_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_counter_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref LAST_SYNC_DURATION_MILLIS_MD: MetricDescriptor =

crates/obs/src/metrics/cluster_notification.rs

@@ -1,5 +1,5 @@
 /// Notify the relevant metric descriptor
-use crate::metrics::{new_counter_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_counter_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref NOTIFICATION_CURRENT_SEND_IN_PROGRESS_MD: MetricDescriptor =

crates/obs/src/metrics/cluster_usage.rs

@@ -1,5 +1,5 @@
 /// Descriptors of metrics related to cluster object and bucket usage
-use crate::metrics::{new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 
 /// Bucket labels
 pub const BUCKET_LABEL: &str = "bucket";

crates/obs/src/metrics/ilm.rs

@@ -1,5 +1,5 @@
 /// ILM-related metric descriptors
-use crate::metrics::{new_counter_md, new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref ILM_EXPIRY_PENDING_TASKS_MD: MetricDescriptor =

crates/obs/src/metrics/logger_webhook.rs

@@ -1,5 +1,5 @@
 /// A descriptor for metrics related to webhook logs
-use crate::metrics::{new_counter_md, new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 
 /// Define label constants for webhook metrics
 /// name label

crates/obs/src/metrics/mod.rs

@@ -23,6 +23,6 @@ pub use entry::descriptor::MetricDescriptor;
 pub use entry::metric_name::MetricName;
 pub use entry::metric_type::MetricType;
 pub use entry::namespace::MetricNamespace;
-pub use entry::subsystem::subsystems;
 pub use entry::subsystem::MetricSubsystem;
+pub use entry::subsystem::subsystems;
 pub use entry::{new_counter_md, new_gauge_md, new_histogram_md};

crates/obs/src/metrics/replication.rs

@@ -1,5 +1,5 @@
 /// Copy the relevant metric descriptor
-use crate::metrics::{new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref REPLICATION_AVERAGE_ACTIVE_WORKERS_MD: MetricDescriptor =

crates/obs/src/metrics/request.rs

@@ -1,4 +1,4 @@
-use crate::metrics::{new_counter_md, new_gauge_md, subsystems, MetricDescriptor, MetricName, MetricSubsystem};
+use crate::metrics::{MetricDescriptor, MetricName, MetricSubsystem, new_counter_md, new_gauge_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref API_REJECTED_AUTH_TOTAL_MD: MetricDescriptor =

crates/obs/src/metrics/scanner.rs

@@ -1,5 +1,5 @@
 /// Scanner-related metric descriptors
-use crate::metrics::{new_counter_md, new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref SCANNER_BUCKET_SCANS_FINISHED_MD: MetricDescriptor =

crates/obs/src/metrics/system_cpu.rs

@@ -1,5 +1,5 @@
 /// CPU system-related metric descriptors
-use crate::metrics::{new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref SYS_CPU_AVG_IDLE_MD: MetricDescriptor =

crates/obs/src/metrics/system_drive.rs

@@ -1,5 +1,5 @@
 /// Drive-related metric descriptors
-use crate::metrics::{new_counter_md, new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 
 /// drive related labels
 pub const DRIVE_LABEL: &str = "drive";

crates/obs/src/metrics/system_memory.rs

@@ -1,5 +1,5 @@
 /// Memory-related metric descriptors
-use crate::metrics::{new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref MEM_TOTAL_MD: MetricDescriptor =

crates/obs/src/metrics/system_network.rs

@@ -1,5 +1,5 @@
 /// Network-related metric descriptors
-use crate::metrics::{new_counter_md, new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref INTERNODE_ERRORS_TOTAL_MD: MetricDescriptor =

crates/obs/src/metrics/system_process.rs

@@ -1,5 +1,5 @@
 /// process related metric descriptors
-use crate::metrics::{new_counter_md, new_gauge_md, subsystems, MetricDescriptor, MetricName};
+use crate::metrics::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 
 lazy_static::lazy_static! {
     pub static ref PROCESS_LOCKS_READ_TOTAL_MD: MetricDescriptor =

crates/obs/src/telemetry.rs

@@ -1,19 +1,19 @@
 use crate::OtelConfig;
-use flexi_logger::{style, Age, Cleanup, Criterion, DeferredNow, FileSpec, LogSpecification, Naming, Record, WriteMode};
+use flexi_logger::{Age, Cleanup, Criterion, DeferredNow, FileSpec, LogSpecification, Naming, Record, WriteMode, style};
 use nu_ansi_term::Color;
 use opentelemetry::trace::TracerProvider;
-use opentelemetry::{global, KeyValue};
+use opentelemetry::{KeyValue, global};
 use opentelemetry_appender_tracing::layer::OpenTelemetryTracingBridge;
 use opentelemetry_otlp::WithExportConfig;
 use opentelemetry_sdk::logs::SdkLoggerProvider;
 use opentelemetry_sdk::{
+    Resource,
     metrics::{MeterProviderBuilder, PeriodicReader, SdkMeterProvider},
     trace::{RandomIdGenerator, Sampler, SdkTracerProvider},
-    Resource,
 };
 use opentelemetry_semantic_conventions::{
-    attribute::{DEPLOYMENT_ENVIRONMENT_NAME, NETWORK_LOCAL_ADDRESS, SERVICE_VERSION as OTEL_SERVICE_VERSION},
     SCHEMA_URL,
+    attribute::{DEPLOYMENT_ENVIRONMENT_NAME, NETWORK_LOCAL_ADDRESS, SERVICE_VERSION as OTEL_SERVICE_VERSION},
 };
 use rustfs_config::{
     APP_NAME, DEFAULT_LOG_DIR, DEFAULT_LOG_KEEP_FILES, DEFAULT_LOG_LEVEL, ENVIRONMENT, METER_INTERVAL, SAMPLE_RATIO,
@@ -28,7 +28,7 @@ use tracing_error::ErrorLayer;
 use tracing_opentelemetry::{MetricsLayer, OpenTelemetryLayer};
 use tracing_subscriber::fmt::format::FmtSpan;
 use tracing_subscriber::fmt::time::LocalTime;
-use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt, EnvFilter, Layer};
+use tracing_subscriber::{EnvFilter, Layer, layer::SubscriberExt, util::SubscriberInitExt};
 
 /// A guard object that manages the lifecycle of OpenTelemetry components.
 ///