ci: Add post-merge workflow (#4922)

Signed-off-by: pvijayakrish <pvijayakrish@nvidia.com>
Signed-off-by: Pavithra Vijayakrishnan <160681768+pvijayakrish@users.noreply.github.com>

.github/workflows/container-validation-backends.yml

@@ -218,6 +218,8 @@ jobs:
           echo ${K8S_NODE_NAME}
       - name: Checkout repository
         uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955  # v4.3.0
+        with:
+          lfs: true
       - name: Docker Login
         uses: ./.github/actions/docker-login
         with:
@@ -280,6 +282,8 @@ jobs:
           echo ${K8S_NODE_NAME}
       - name: Checkout code
         uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955  # v4.3.0
+        with:
+          lfs: true
       - name: Docker Login
         uses: ./.github/actions/docker-login
         with:

.github/workflows/post-merge-ci.yml

+# SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+name: Post-Merge CI Pipeline
+
+on:
+  push:
+    branches:
+      - main
+      - 'release/*.*.*'
+
+permissions:
+  contents: read
+
+jobs:
+  ci-pipeline:
+    name: Post-Merge CI
+    uses: ./.github/workflows/ci-test-suite.yml
+    with:
+      pipeline_type: post_merge
+      include_nightly_marks: false
+      image_prefix: main
+      enable_slack_notification: true
+    secrets:
+      AWS_ACCOUNT_ID: ${{ secrets.AWS_ACCOUNT_ID }}
+      AWS_DEFAULT_REGION: ${{ secrets.AWS_DEFAULT_REGION }}
+      AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+      AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+      NGC_CI_ACCESS_TOKEN: ${{ secrets.NGC_CI_ACCESS_TOKEN }}
+      CI_TOKEN: ${{ secrets.CI_TOKEN }}
+      SCCACHE_S3_BUCKET: ${{ secrets.SCCACHE_S3_BUCKET }}
+      AZURE_ACR_HOSTNAME: ${{ secrets.AZURE_ACR_HOSTNAME }}
+      AZURE_ACR_USER: ${{ secrets.AZURE_ACR_USER }}
+      AZURE_ACR_PASSWORD: ${{ secrets.AZURE_ACR_PASSWORD }}
+      SLACK_NOTIFY_NIGHTLY_WEBHOOK_URL: ${{ secrets.SLACK_NOTIFY_NIGHTLY_WEBHOOK_URL }}
+      SLACK_OPS_SUPPORT_GROUP_ID: ${{ secrets.SLACK_OPS_SUPPORT_GROUP_ID }}
+      AZURE_AKS_CI_KUBECONFIG_B64: ${{ secrets.AZURE_AKS_CI_KUBECONFIG_B64 }}
+      HF_TOKEN: ${{ secrets.HF_TOKEN }}
+      DYNAMO_INGRESS_SUFFIX: ${{ secrets.DYNAMO_INGRESS_SUFFIX }}