feat(P25): deploy outputs (SSM + PR comment) + error reporting via Lambda + stage comments

---ci---
project: acdl
phase: 25
milestone: v1.7
status: execute
---/ci---

.github/workflows/ci.yml

@@ -37,6 +37,7 @@ jobs:
           python3 -m py_compile \
             core/confidence_signal.py \
             core/outbox_writer.py \
+            core/output_publisher.py \
             core/contract_resolver.py \
             core/lambda/contract_ingestor.py \
             adapters/terraform/adapter.py \

.github/workflows/deploy.yml

@@ -112,6 +112,26 @@ jobs:
           esac
           bash platform/scripts/run_platform.sh $MODE_FLAG "${{ inputs.contract }}"
 
+      - name: Post stage summary comment to PR
+        if: success() && github.event_name == 'pull_request'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_REPOSITORY: ${{ github.repository }}
+          GITHUB_REF: ${{ github.ref }}
+        run: |
+          bash platform/scripts/post_stage_comment.sh deploy pass '{"mode":"${{ inputs.mode }}","runId":"${{ github.run_id }}"}'
+
+      - name: Report error to platform team (on failure)
+        if: failure()
+        env:
+          AWS_DEFAULT_REGION: us-east-1
+        run: |
+          aws lambda invoke-function-url \
+            --function-url "${{ secrets.ACDL_LAMBDA_URL }}" \
+            --cli-binary-format raw-in-base64-out \
+            --payload "$(python3 -c "import json,os; print(json.dumps({'action':'report_error','consumerRepo':os.environ.get('GITHUB_REPOSITORY',''),'contractId':'${{ github.run_id }}','error':'Deploy pipeline failed. See run logs.','runUrl':'${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}','environment':'dev'}))")" \
+            /dev/null || true
+
       - name: Upload emitted Terraform
         uses: actions/upload-artifact@v4
         with: