ci: run CI on self-hosted -4x runners

GitHub public runners are too constrained for the operator build; switch ci.yml
to the self-hosted -4x runner pool (ubuntu-24.04 -> ubuntu-24.04-4x,
ubuntu-24.04-arm -> ubuntu-24.04-arm-4x).

Signed-off-by: thxCode <thxcode0824@gmail.com>

Author: thxCode

.github/workflows/ci-chart.yml

@@ -34,6 +34,7 @@ on:
 
 jobs:
   lint-test:
+    if : ${{ github.event_name == 'pull_request' || (github.event.pull_request.changed_files > 0 && contains(github.event.pull_request.changed_files, 'deploy/gpustack-operator/chart/')) }}
     timeout-minutes: 60
     runs-on: ubuntu-24.04
     steps:

.github/workflows/ci.yml

@@ -64,11 +64,11 @@ jobs:
           cat <<EOF > matrix.json
           [
               {
-                "runner": "ubuntu-24.04",
+                "runner": "ubuntu-24.04-4x",
                 "platform": "linux/amd64"
               },
               {
-                "runner": "ubuntu-24.04-arm",
+                "runner": "ubuntu-24.04-arm-4x",
                 "platform": "linux/arm64"
               }
           ]

specs/2026-06-25-accelerator-soft-slicing-runtime-isolation.md

@@ -1,6 +1,6 @@
 # Spec: Accelerator Soft-Slicing Runtime Isolation (NVIDIA HAMi-core / Ascend vcann-rt)
 
-Status: Built
+Status: Shipped
 
 ## Summary