chore(deps): update all tool versions across the codebase

Update to latest stable versions:
- pnpm: 9.12.0 → 10.26.0
- Docker: 28.5.0/28.5.2 → 29.1.3
- Nixpacks: 1.39.0 → 1.41.0
- Railpack: 0.2.2/0.15.0 → 0.15.1
- buildpacks/pack: 0.35.0 → 0.39.1

Files updated:
- All Dockerfiles (main, schedule, cloud, server)
- All package.json files (root, server, api, schedules, dokploy)
- GitHub workflow (pull-request.yml)
- Server setup script
- Database schema and DBML files
- Test fixtures
- UI components

CONTRIBUTING.md

@@ -148,7 +148,7 @@ curl -sSL https://railpack.com/install.sh | sh
 
 ```bash
 # Install Buildpacks
-curl -sSL "https://github.com/buildpacks/pack/releases/download/v0.35.0/pack-v0.35.0-linux.tgz" | tar -C /usr/local/bin/ --no-same-owner -xzv pack
+curl -sSL "https://github.com/buildpacks/pack/releases/download/v0.39.1/pack-v0.39.1-linux.tgz" | tar -C /usr/local/bin/ --no-same-owner -xzv pack
 ```
 
 ## Pull Request