Address final cpflow review notes

Author: justin808

.github/actions/cpflow-delete-control-plane-app/check-app-exists.sh

@@ -6,6 +6,7 @@
 - Creates the review app if it does not exist
 - Builds the PR commit image
 - Deploys the image and comments with the review URL
+- The command must be the only text in the comment
 
 `/delete-review-app`
 - Deletes the review app when the PR is done

.github/cpflow-help.md

@@ -171,13 +171,6 @@ jobs:
           cpln_cli_version: ${{ vars.CPLN_CLI_VERSION }}
           cpflow_version: ${{ vars.CPFLOW_VERSION }}
 
-      - name: Detect release phase support
-        if: steps.config.outputs.ready == 'true' && steps.source.outputs.allowed == 'true'
-        id: release-phase
-        uses: ./.github/actions/cpflow-detect-release-phase
-        with:
-          app_name: ${{ env.APP_NAME }}
-
       - name: Check if review app exists
         if: steps.config.outputs.ready == 'true' && steps.source.outputs.allowed == 'true'
         id: check-app
@@ -213,6 +206,13 @@ jobs:
           set -euo pipefail
           cpflow setup-app -a "${APP_NAME}" --org "${CPLN_ORG}"
 
+      - name: Detect release phase support
+        if: steps.config.outputs.ready == 'true' && steps.source.outputs.allowed == 'true' && (steps.check-app.outputs.exists == 'true' || steps.setup-review-app.outcome == 'success')
+        id: release-phase
+        uses: ./.github/actions/cpflow-detect-release-phase
+        with:
+          app_name: ${{ env.APP_NAME }}
+
       - name: Create initial PR comment
         if: steps.config.outputs.ready == 'true' && steps.source.outputs.allowed == 'true' && (steps.check-app.outputs.exists == 'true' || steps.setup-review-app.outcome == 'success')
         id: create-comment