feat: componentize GStack 2 runtime and release integrity

.github/workflows/make-pdf-gate.yml

@@ -1,4 +1,7 @@
 name: make-pdf copy-paste gate
+permissions:
+  contents: read
+
 on:
   pull_request:
     branches: [main]
@@ -36,11 +39,11 @@ jobs:
 
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
-      - uses: oven-sh/setup-bun@v2
+      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
         with:
-          bun-version: latest
+          bun-version: 1.3.14
 
       - name: Install dependencies
         run: bun install --frozen-lockfile