fix: revert to default pnpm mode for Docker compatibility

Hoisted mode is incompatible with Docker's overlay filesystem.
Remove .npmrc and regenerate lockfile with default isolated mode.

This maintains semantic-release functionality while allowing
Docker builds to succeed.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.npmrc

@@ -1 +0,0 @@
-node-linker=hoisted