refactor: standardize constant management and fix typos (#387)

* init rustfs config

* init rustfs-utils crate

* improve code for rustfs-config crate

* add

* improve code for comment

* init rustfs config

* improve code for rustfs-config crate

* add

* improve code for comment

* Unified management of configurations and constants

* fix: modify rustfs-config crate name

* add default fn

* improve code for rustfs config

* refactor: standardize constant management and fix typos

- Create centralized constants module for global static constants
- Replace runtime format! expressions with compile-time constants
- Fix DEFAULT_PORT reference issues in configuration arguments
- Use const-str crate for compile-time string concatenation
- Update tokio dependency from 1.42.2 to 1.45.0
- Ensure consistent naming convention for configuration constants

* fix

* Update common/workers/src/workers.rs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

crates/config/src/observability/otel.rs

@@ -0,0 +1,27 @@
+use serde::Deserialize;
+
+/// OpenTelemetry configuration
+#[derive(Debug, Deserialize, Clone)]
+pub struct OtelConfig {
+    pub endpoint: String,
+    pub service_name: String,
+    pub service_version: String,
+    pub resource_attributes: Vec<String>,
+}
+
+impl OtelConfig {
+    pub fn new() -> Self {
+        Self {
+            endpoint: "http://localhost:4317".to_string(),
+            service_name: "rustfs".to_string(),
+            service_version: "0.1.0".to_string(),
+            resource_attributes: vec![],
+        }
+    }
+}
+
+impl Default for OtelConfig {
+    fn default() -> Self {
+        Self::new()
+    }
+}