Various V2 updates and fixes (#1421)

This pull request updates the deployment workflow configuration in
`.github/workflows/v2-deploy-pr.yml`. The changes focus on improving the
logic for determining pull request identifiers and updating the
deployment environment.

Workflow logic updates:

* Replaced the condition for checking `updated_demos` with a condition
for checking `pr_id` to ensure accurate identification of pull requests.
(`[.github/workflows/v2-deploy-pr.ymlL83-R88](diffhunk://#diff-bb1f887f50cfc7839e56ce823ccf5b9b7a4a07bfd475c5646b28105610511bf3L83-R88)`)

Environment configuration changes:

* Updated the deployment environment from `'swc-dev'` to `'swc-staging'`
to align with staging requirements.
(`[.github/workflows/v2-deploy-pr.ymlL83-R88](diffhunk://#diff-bb1f887f50cfc7839e56ce823ccf5b9b7a4a07bfd475c5646b28105610511bf3L83-R88)`)

---------

Co-authored-by: Paul Finlay <50180049+doctorperceptron@users.noreply.github.com>

Author: Alan-eMartin

.github/workflows/v2-deploy-pr.yml

@@ -80,12 +80,13 @@ jobs:
       github.event.workflow_run.event == 'pull_request' && 
       needs.prepare-build-context.result == 'success' &&
       needs.prepare-build-context.outputs.pr_ref != '' &&
+      needs.prepare-build-context.outputs.pr_id != '' &&
       needs.prepare-build-context.outputs.updated_demos != '[]'
     uses: ./.github/workflows/v2-deploy-demos.yml
     needs: prepare-build-context
     with:
       # TODO: Update SWC environment to "swc-prod"
-      environment: 'swc-dev' 
+      environment: 'swc-staging'
       artifact-name: demo-build-${{ needs.prepare-build-context.outputs.pr_ref }}
       workflow-run-id: ${{ github.event.workflow_run.id }}
       pr_number: ${{ fromJson(needs.prepare-build-context.outputs.pr_id) }}