ops: expose deployment run on draft PR

.github/workflows/ops-deploy-runner-fleet.yml

@@ -4,6 +4,9 @@ on:
   push:
     branches:
       - ops/deploy-runner-fleet-20260818
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 permissions:
@@ -15,6 +18,7 @@ concurrency:
 
 jobs:
   deploy:
+    if: github.event_name != 'pull_request' || github.head_ref == 'ops/deploy-runner-fleet-20260818'
     runs-on: [self-hosted, Linux, X64, co-server]
     timeout-minutes: 30
     steps: