Make sqs/sns arn optional

Author: lbeschastny

README.md

@@ -151,11 +151,11 @@ let pubsub_telemetry_layer = OtelLambdaLayer::pubsub(
 ```rust
 let sqs_telemetry_layer = OtelLambdaLayer::sqs(
     provider,
-    "arn:aws:sqs:us-east-2:123456789012:MyQueue",
+    Some("arn:aws:sqs:us-east-2:123456789012:MyQueue"),
 );
 let sns_telemetry_layer = OtelLambdaLayer::sns(
     provider,
-    "arn:aws:sns:us-east-2:123456789012:MyTopic",
+    Some("arn:aws:sns:us-east-2:123456789012:MyTopic"),
 );
 ```
 

src/middleware/lambda/context.rs

@@ -116,13 +116,13 @@ impl OtelLambdaLayer<GenericLambdaService> {
 }
 
 impl OtelLambdaLayer<PubSubLambdaService> {
-    pub fn sqs(provider: TracerProvider, queue_arn: impl Into<StringValue>) -> Self {
-        Self::pubsub(provider, "AmazonSQS", Some(queue_arn))
+    pub fn sqs(provider: TracerProvider, queue_arn: impl Into<OptionalValue>) -> Self {
+        Self::pubsub(provider, "AmazonSQS", queue_arn)
     }
 }
 
 impl OtelLambdaLayer<PubSubLambdaService> {
-    pub fn sns(provider: TracerProvider, topic_arn: impl Into<StringValue>) -> Self {
-        Self::pubsub(provider, "AmazonSNS", Some(topic_arn))
+    pub fn sns(provider: TracerProvider, topic_arn: impl Into<OptionalValue>) -> Self {
+        Self::pubsub(provider, "AmazonSNS", topic_arn)
     }
 }