Fix e2e comment/error-message accuracy (dispatch-only region note, secret names in guard)

Author: jpr5

.github/workflows/e2e-tests-full.yml

@@ -64,7 +64,7 @@ jobs:
         if: matrix.cdk-source == 'main'
         run: |
           set -euo pipefail
-          [ -n "${CDK_REPO_TOKEN:-}" ] && [ -n "${CDK_REPO:-}" ] || { echo "::error::CDK_REPO and CDK_REPO_TOKEN must be set"; exit 1; }
+          [ -n "${CDK_REPO_TOKEN:-}" ] && [ -n "${CDK_REPO:-}" ] || { echo "::error::Required secrets CDK_REPO_NAME and CDK_REPO_TOKEN are not configured"; exit 1; }
           git clone --depth 1 --branch main "https://x-access-token:${CDK_REPO_TOKEN}@github.com/${CDK_REPO}.git" /tmp/cdk-repo
           cd /tmp/cdk-repo
           npm ci

.github/workflows/e2e-tests.yml

@@ -25,8 +25,9 @@ jobs:
     environment: e2e-testing
     timeout-minutes: 30
     env:
-      # Single source for the AWS region default. On `workflow_dispatch` the
-      # input applies; on other events `inputs` is empty so the fallback applies.
+      # Single source for the AWS region default. This workflow is
+      # dispatch-only, so the input always applies; the fallback guards the
+      # case where the optional `aws_region` input is left blank on dispatch.
       AWS_REGION: ${{ inputs.aws_region || 'us-east-1' }}
     strategy:
       fail-fast: false
@@ -80,7 +81,7 @@ jobs:
         if: matrix.cdk-source == 'main'
         run: |
           set -euo pipefail
-          [ -n "${CDK_REPO_TOKEN:-}" ] && [ -n "${CDK_REPO:-}" ] || { echo "::error::CDK_REPO and CDK_REPO_TOKEN must be set"; exit 1; }
+          [ -n "${CDK_REPO_TOKEN:-}" ] && [ -n "${CDK_REPO:-}" ] || { echo "::error::Required secrets CDK_REPO_NAME and CDK_REPO_TOKEN are not configured"; exit 1; }
           git clone --depth 1 --branch main "https://x-access-token:${CDK_REPO_TOKEN}@github.com/${CDK_REPO}.git" /tmp/cdk-repo
           cd /tmp/cdk-repo
           npm ci