Add Portainer webhook trigger to CI workflow

Automatically redeploy the stack when new images are pushed to the registry.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitea/workflows/build-and-push.yml

@@ -50,3 +50,8 @@ jobs:
           cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache
           cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache,mode=max
 
+      - name: Trigger Portainer stack update
+        if: gitea.event_name != 'pull_request'
+        run: |
+          curl -X POST -k "https://10.0.1.224:9443/api/stacks/webhooks/863fc57c-bf24-4c63-9001-bdf9912fba73"
+