Add RunPod endpoint update and worker purge to CI

Updates the serverless endpoint with new image tag and purges
existing workers to force restart with the new image after build.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.gitea/workflows/build.yaml

@@ -8,6 +8,7 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    timeout-minutes: 120
     container:
       image: catthehacker/ubuntu:act-latest
 
@@ -42,3 +43,19 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+
+      - name: Update RunPod Endpoint
+        run: |
+          curl -s -X POST "https://api.runpod.io/graphql?api_key=${{ secrets.RUNPOD_API_KEY }}" \
+            -H "Content-Type: application/json" \
+            -d '{
+              "query": "mutation { saveEndpoint(input: { id: \"${{ secrets.RUNPOD_ENDPOINT_ID }}\", imageName: \"flybynight69420/comfyui-serverless:latest\" }) { id imageName } }"
+            }'
+
+      - name: Purge RunPod Workers
+        run: |
+          curl -s -X POST "https://api.runpod.io/graphql?api_key=${{ secrets.RUNPOD_API_KEY }}" \
+            -H "Content-Type: application/json" \
+            -d '{
+              "query": "mutation { endpointPurgeQueue(input: { endpointId: \"${{ secrets.RUNPOD_ENDPOINT_ID }}\" }) }"
+            }'