ci: add deploy-agent workflow triggered on deploy/agent branch (#37496)

.github/workflows/deploy-agent.yml

@@ -0,0 +1,28 @@
+name: Deploy Agent
+
+permissions:
+  contents: read
+
+on:
+  workflow_run:
+    workflows: ["Build and Push API & Web"]
+    branches:
+      - "deploy/agent"
+    types:
+      - completed
+
+jobs:
+  deploy:
+    runs-on: depot-ubuntu-24.04
+    if: |
+      github.event.workflow_run.conclusion == 'success' &&
+      github.event.workflow_run.head_branch == 'deploy/agent'
+    steps:
+      - name: Deploy to server
+        uses: appleboy/ssh-action@0ff4204d59e8e51228ff73bce53f80d53301dee2 # v1.2.5
+        with:
+          host: ${{ secrets.AGENT_SSH_HOST }}
+          username: ${{ secrets.SSH_USER }}
+          key: ${{ secrets.SSH_PRIVATE_KEY }}
+          script: |
+            ${{ vars.SSH_SCRIPT_AGENT || secrets.SSH_SCRIPT_AGENT }}