add sample run config

llama_stack/providers/remote/telemetry/opentelemetry/config.py

@@ -4,9 +4,24 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from pydantic import BaseModel
+from typing import Any, Dict
+
+from pydantic import BaseModel, Field
 
 
 class OpenTelemetryConfig(BaseModel):
-    otel_endpoint: str = "http://localhost:4318/v1/traces"
-    service_name: str = "llama-stack"
+    otel_endpoint: str = Field(
+        default="http://localhost:4318/v1/traces",
+        description="The OpenTelemetry collector endpoint URL",
+    )
+    service_name: str = Field(
+        default="llama-stack",
+        description="The service name to use for telemetry",
+    )
+
+    @classmethod
+    def sample_run_config(cls, **kwargs) -> Dict[str, Any]:
+        return {
+            "otel_endpoint": "${env.OTEL_ENDPOINT:http://localhost:4318/v1/traces}",
+            "service_name": "${env.OTEL_SERVICE_NAME:llama-stack}",
+        }