ci: bypass maintenance gate for PR Test on main (#21082)

.github/actions/check-maintenance/action.yml

@@ -1,5 +1,5 @@
 name: Check Maintenance Mode
-description: Blocks CI when maintenance mode is active (issue #21065 is open), unless the PR has the bypass-maintenance label.
+description: Blocks CI when maintenance mode is active (issue #21065 is open), unless the PR has the bypass-maintenance label, or env SGLANG_PR_TEST_BYPASS_MAINTENANCE_ON_MAIN=true (PR Test workflow on main only).
 
 inputs:
   github-token:
@@ -18,6 +18,12 @@ runs:
         REPO="${{ github.repository }}"
         PR_NUMBER="${{ github.event.pull_request.number }}"
 
+        # PR Test workflow only: scheduled runs and runs on main (dispatch / workflow_call) set this env
+        if [[ "${SGLANG_PR_TEST_BYPASS_MAINTENANCE_ON_MAIN:-}" == "true" ]]; then
+          echo "✅ PR Test on main branch; bypassing maintenance gate."
+          exit 0
+        fi
+
         # Check if maintenance issue is open (fail-open: if API errors, allow CI to proceed)
         ISSUE_STATE=$(gh issue view "$MAINTENANCE_ISSUE" --repo "$REPO" --json state --jq '.state' 2>/dev/null || echo "UNKNOWN")
 

.github/workflows/pr-test.yml

@@ -57,6 +57,8 @@ env:
   SGLANG_IS_IN_CI: true
   SGLANG_CUDA_COREDUMP: "1"
   SGLANG_JIT_DEEPGEMM_FAST_WARMUP: true
+  # Schedule / main-branch dispatch / workflow_call from main use refs/heads/main; PR events use refs/pull/*/merge
+  SGLANG_PR_TEST_BYPASS_MAINTENANCE_ON_MAIN: ${{ github.ref == 'refs/heads/main' && 'true' || 'false' }}
 
 permissions:
   actions: write