Update ZenStack packages to v3

Update all ZenStack packages to v3 versions:

- `@zenstackhq/cli@next`
- `@zenstackhq/orm@next`
- Any other `@zenstackhq/*` packages in use

**Acceptance Criteria:**
- All ZenStack packages updated to v3
- `npm install` / `pnpm install` completes without errors
- Project builds successfully after package updates

Part of the ZenStack v2 → v3 upgrade.