fix(ci): remove npm cache and npm ci since package-lock.json is gitignored

Use npm install instead of npm ci, and remove cache: 'npm' from
setup-node steps since package-lock.json is in .gitignore.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: O6lvl4

.github/workflows/ci.yml

@@ -21,10 +21,9 @@ jobs:
       uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node-version }}
-        cache: 'npm'
 
     - name: Install dependencies
-      run: npm ci
+      run: npm install
 
     - name: Build
       run: npm run build
@@ -46,10 +45,9 @@ jobs:
       uses: actions/setup-node@v4
       with:
         node-version: '20.x'
-        cache: 'npm'
 
     - name: Install dependencies
-      run: npm ci
+      run: npm install
 
     - name: Build
       run: npm run build

.github/workflows/release.yml

@@ -21,10 +21,9 @@ jobs:
       with:
         node-version: '20.x'
         registry-url: 'https://registry.npmjs.org'
-        cache: 'npm'
 
     - name: Install dependencies
-      run: npm ci
+      run: npm install
 
     - name: Build
       run: npm run build