ci(security): pin GitHub Actions to commit SHAs for supply chain security (#134)

Replace all mutable version tags with immutable commit SHA references
to prevent supply chain attacks via tag mutation.

- actions/checkout@v4 → @34e114876b0b...
- actions/setup-node@v4 → @49933ea5288c...
- actions/cache@v4 → @0057852bfaa8...
- oven-sh/setup-bun@v2 → @0c5077e51419...
- actions/create-github-app-token@v2 → @fee1f7d63c2f...
- googleapis/release-please-action@v4 → @16a9c90856f4...

Author: amondnet

.github/workflows/ci.yml

@@ -22,21 +22,21 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version-file: '.nvmrc'
 
       - name: Setup Bun
-        uses: oven-sh/setup-bun@v2
+        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
         with:
           bun-version-file: 'package.json'
 
       # ESLint 캐시 복원
       - name: Restore ESLint cache
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
         with:
           path: |
             .eslintcache
@@ -59,15 +59,15 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version-file: '.nvmrc'
 
       - name: Setup Bun
-        uses: oven-sh/setup-bun@v2
+        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
         with:
           bun-version-file: 'package.json'
 
@@ -84,15 +84,15 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version-file: '.nvmrc'
 
       - name: Setup Bun
-        uses: oven-sh/setup-bun@v2
+        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
         with:
           bun-version-file: 'package.json'
 
@@ -109,15 +109,15 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: '22'
 
       - name: Setup Bun
-        uses: oven-sh/setup-bun@v2
+        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
         with:
           bun-version-file: 'package.json'
 

.github/workflows/release-please.yml

@@ -13,12 +13,12 @@ jobs:
   release-please:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/create-github-app-token@v2
+      - uses: actions/create-github-app-token@fee1f7d63c2ff003460e3d139729b119787bc349 # v2
         id: app-token
         with:
           app-id: ${{ secrets.APP_ID }}
           private-key: ${{ secrets.PRIVATE_KEY }}
-      - uses: googleapis/release-please-action@v4
+      - uses: googleapis/release-please-action@16a9c90856f42705d54a6fda1823352bdc62cf38 # v4
         with:
           token: ${{ steps.app-token.outputs.token }}
           config-file: 'release-please-config.json'