🔧 Migrate from npm to Bun (#2097)

.github/workflows/generate-client.yml

@@ -20,9 +20,7 @@ jobs:
       with:
         ref: ${{ github.head_ref }}
         token: ${{ secrets.FULL_STACK_FASTAPI_TEMPLATE_REPO_TOKEN }}
-    - uses: actions/setup-node@v6
-      with:
-        node-version: lts/*
+    - uses: oven-sh/setup-bun@v2
     - uses: actions/setup-python@v6
       with:
         python-version: "3.10"
@@ -32,7 +30,7 @@ jobs:
         version: "0.4.15"
         enable-cache: true
     - name: Install dependencies
-      run: npm ci
+      run: bun ci
     - run: uv sync
       working-directory: backend
     - run: uv run bash scripts/generate-client.sh