test: shorten comments in durable cold-start integration test

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: lym953

integration-tests/lib/stacks/durable-cold-start.ts

@@ -10,12 +10,7 @@ import {
   defaultNodeRuntime,
 } from '../util';
 
-// Durable-function cold-start metric tag test.
-// The Lambda Telemetry API only reports a `platform.initStart` runtimeVersion
-// containing "DurableFunction" for functions actually configured with
-// `durableConfig`, so this stack deploys one durable and one non-durable
-// function to exercise bottlecap's `durable_function:true` tagging on the
-// cold-start `aws.lambda.enhanced.invocations` metric end-to-end.
+// Deploys a durable and a non-durable function to test the cold-start durable_function tag.
 export class DurableColdStart extends cdk.Stack {
   constructor(scope: Construct, id: string, props: cdk.StackProps) {
     super(scope, id, props);

integration-tests/tests/durable-cold-start.test.ts

@@ -1,8 +1,4 @@
-// Verifies bottlecap holds the cold-start `aws.lambda.enhanced.invocations`
-// metric until the Telemetry API's `platform.initStart` event reports the
-// runtime, so the metric carries `durable_function:true` for a real
-// durable-configured Lambda function (#1301). A plain (non-durable) function
-// is invoked alongside as a guard against the tag being set unconditionally.
+// Verifies the cold-start invocations metric has durable_function:true only for a durable function.
 import { hasMetricWithTag } from './utils/datadog';
 import { forceColdStart, invokeLambda } from './utils/lambda';
 import { IDENTIFIER, DEFAULT_DATADOG_INDEXING_WAIT_MS } from '../config';
@@ -23,15 +19,10 @@ describe('Durable Function Cold-Start Metric Tag Integration Tests', () => {
 
     await Promise.all(functionNames.map((fn) => forceColdStart(fn)));
 
-    // Back up the query window by 60s so the metric bucket (which Datadog
-    // aligns to the rollup interval boundary, often before the invocation)
-    // falls inside the range we pass to /api/v1/query.
+    // Back up 60s so the metric's rollup bucket falls inside the query range.
     invocationStartTime = Date.now() - 60_000;
 
-    // Durable functions reject unqualified-ARN invokes ("You cannot invoke a
-    // durable function using an unqualified ARN"); `:$LATEST` satisfies that
-    // without publishing a version. Metric queries below use the base
-    // (unqualified) function name, which is unaffected by this qualifier.
+    // Durable functions reject unqualified-ARN invokes; `:$LATEST` avoids publishing a version.
     await Promise.all([
       invokeLambda(`${durableFunctionName}:$LATEST`),
       invokeLambda(nonDurableFunctionName),