use standard tracing and logging in brightstaff (#721)

crates/brightstaff/src/tracing/mod.rs

@@ -1,5 +1,35 @@
 mod constants;
+mod service_name_exporter;
 
 pub use constants::{
     error, http, llm, operation_component, routing, signals, OperationNameBuilder,
 };
+pub use service_name_exporter::{ServiceNameOverrideExporter, SERVICE_NAME_OVERRIDE_KEY};
+
+use opentelemetry::trace::get_active_span;
+use opentelemetry::KeyValue;
+
+/// Sets the service name override on the current active OpenTelemetry span.
+///
+/// This function adds the `service.name.override` attribute to the active
+/// OpenTelemetry span, which allows observability backends to filter and group
+/// spans by their logical service (e.g., `plano(llm)`, `plano(filter)`).
+///
+/// # Arguments
+/// * `service_name` - The service name to use (e.g., `operation_component::LLM`)
+///
+/// # Example
+/// ```rust,ignore
+/// use brightstaff::tracing::{set_service_name, operation_component};
+///
+/// // Inside a traced function:
+/// set_service_name(operation_component::LLM);
+/// ```
+pub fn set_service_name(service_name: &str) {
+    get_active_span(|span| {
+        span.set_attribute(KeyValue::new(
+            SERVICE_NAME_OVERRIDE_KEY,
+            service_name.to_string(),
+        ));
+    });
+}