ci(e2e): clarify scenario dry-run summary (#4656)

## Summary
Clarifies the GitHub Step Summary emitted by the scenario workflow so
maintainers can see that it ran the typed dry-run path. The summary now
renders scenario, manifest, expected state, suite, and phase data from
the typed run-plan artifact.

## Related Issue
Refs #3588.

## Changes
- Rename the summary step to `Append typed dry-run summary`.
- Add an explicit typed dry-run mode note to the workflow summary.
- Render `.e2e/run-plan.json` as a compact markdown table with fallback
text when no plan artifact exists.

## Type of Change
- [x] Code change (feature, bug fix, or refactor)
- [ ] Code change with doc updates
- [ ] Doc only (prose changes, no code sample modifications)
- [ ] Doc only (includes code sample changes)

## Verification
- [ ] `npx prek run --all-files` passes
- [ ] `npm test` passes
- [ ] Tests added or updated for new or changed behavior
- [x] No secrets, API keys, or credentials committed
- [ ] Docs updated for user-facing behavior changes
- [ ] `npm run docs` builds without warnings (doc changes only)
- [ ] Doc pages follow the [style
guide](https://github.com/NVIDIA/NemoClaw/blob/main/docs/CONTRIBUTING.md)
(doc changes only)
- [ ] New doc pages include SPDX header and frontmatter (new pages only)

Additional verification run:
- `npx prek run --files .github/workflows/e2e-scenarios.yaml`
- `npx vitest run --project e2e-scenario-framework
test/e2e-scenario/framework-tests/e2e-scenarios-workflow.test.ts
--silent=false --reporter=default`

---
Signed-off-by: Carlos Villela <cvillela@nvidia.com>

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Enhanced E2E scenario test reporting in CI workflows. The test summary
now displays comprehensive scenario execution details in a structured
Markdown table format when available, including scenario identifiers,
test suite information, and execution phases. Improved fallback options
gracefully handle missing or unavailable structured artifacts.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Signed-off-by: Carlos Villela <cvillela@nvidia.com>

Author: cv

.github/workflows/e2e-scenarios.yaml

@@ -324,14 +324,44 @@ jobs:
             exit $LASTEXITCODE
           }
 
-      - name: Append plan summary
+      - name: Append typed dry-run summary
         if: always()
         shell: bash
         run: |
-          if [ -f .e2e/plan.txt ]; then
-            echo '## E2E scenario plan' >> "$GITHUB_STEP_SUMMARY"
-            cat .e2e/plan.txt >> "$GITHUB_STEP_SUMMARY"
-          fi
+          {
+            echo '## E2E typed scenario dry-run'
+            echo ''
+            echo 'Mode: `test/e2e-scenario/scenarios/run.ts --dry-run`.'
+            echo ''
+            if [ -f .e2e/run-plan.json ]; then
+              python3 - <<'PY'
+          import json
+          from pathlib import Path
+
+          plans = json.loads(Path('.e2e/run-plan.json').read_text(encoding='utf-8'))
+          print('| Scenario | Manifest | Expected state | Suites | Phases |')
+          print('| --- | --- | --- | --- | --- |')
+          for plan in plans:
+              suites = ', '.join(f"`{suite}`" for suite in plan.get('suiteIds', [])) or '_none_'
+              phases = ', '.join(f"`{phase.get('name')}`" for phase in plan.get('phases', [])) or '_none_'
+              print(
+                  '| `{scenario}` | `{manifest}` | `{state}` | {suites} | {phases} |'.format(
+                      scenario=plan.get('scenarioId', ''),
+                      manifest=plan.get('manifestPath') or '_none_',
+                      state=plan.get('expectedStateId') or '_none_',
+                      suites=suites,
+                      phases=phases,
+                  )
+              )
+          PY
+            elif [ -f .e2e/plan.txt ]; then
+              echo '```text'
+              cat .e2e/plan.txt
+              echo '```'
+            else
+              echo '_No typed scenario plan artifact was produced._'
+            fi
+          } >> "$GITHUB_STEP_SUMMARY"
 
       - name: Upload scenario artifacts
         if: always()