update sdk and lambda layer release workflows to add layer.zip

Author: yiyuan-he

.github/workflows/release_build.yml

@@ -134,6 +134,16 @@ jobs:
             ./installationScripts/AWS.Otel.DotNet.Auto.psm1 \
             AWS.Otel.DotNet.Auto.psm1.sha256 \
             --clobber
+          # Download layer.zip from existing latest tagged SDK release note
+          LATEST_SDK_VERSION=$(gh release list --repo "aws-observability/aws-otel-dotnet-instrumentation" --json tagName,isLatest -q 'map(select(.isLatest==true)) | .[0].tagName')
+          mkdir -p layer_artifact
+          gh release download "$LATEST_SDK_VERSION" --repo "aws-observability/aws-otel-dotnet-instrumentation" --pattern "layer.zip" --dir layer_artifact
+          shasum -a 256 layer_artifact/layer.zip > layer_artifact/layer.zip.sha256
+          gh release upload "v${{ github.event.inputs.version }}" \
+            layer_artifact/layer.zip \
+            layer_artifact/layer.zip.sha256 \
+            --clobber
+
 
   release-image:
     # We want to build and release nuget first so that if it fails, it fails before publishing to private ECR
@@ -376,4 +386,4 @@ jobs:
           nuget push
           .\Deployment\nuget-packages\*.nupkg
           -Source https://api.nuget.org/v3/index.json
-          -ApiKey $nugetKey.Key
+          -ApiKey $nugetKey.Key

.github/workflows/release_lambda.yml

@@ -209,3 +209,13 @@ jobs:
              layer_arns.tf layer.zip
           echo Removing release_notes.md ...
           rm -f release_notes.md
+      - name: Upload layer.zip and SHA-256 checksum to SDK Release Notes (tagged with latest)
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          LATEST_SDK_VERSION=$(gh release list --repo "aws-observability/aws-otel-dotnet-instrumentation" --json tagName,isLatest -q 'map(select(.isLatest==true)) | .[0].tagName')
+          # Generate SHA-256 checksum for layer.zip
+          shasum -a 256 layer.zip > layer.zip.sha256
+          # Upload layer.zip and its checksum to the latest SDK release note
+          gh release upload "$LATEST_SDK_VERSION" layer.zip layer.zip.sha256 --repo "aws-observability/aws-otel-dotnet-instrumentation" --clobber
+          echo "✅ layer.zip successfully uploaded to $LATEST_SDK_VERSION in the upstream repo!"