chore(deps): pin dependencies

.github/workflows/benchmark.yml

@@ -24,10 +24,10 @@ jobs:
     name: Performance Regression Check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5
         with:
           go-version: '1.25.4'
           cache-dependency-path: backend/go.sum