fix(ci): add pnpm store prune to Dockerfile and post-deploy checks

Clear pnpm cache before installing dependencies in BuildKit and runner
to fix ERR_PNPM_TARBALL_INTEGRITY when internal packages are republished
with the same version.

.gitea/workflows/deploy.yml

@@ -446,7 +446,9 @@ jobs:
           echo "//git.infra.mintel.me/api/packages/mmintel/npm/:_authToken=${{ secrets.NPM_TOKEN }}" >> .npmrc
       - name: Install dependencies
         id: deps
-        run: pnpm install --no-frozen-lockfile
+        run: |
+          pnpm store prune
+          pnpm install --no-frozen-lockfile
       - name: 📦 Cache APT Packages
         uses: actions/cache@v4
         with: