v0.1.4

• Polished the shared common layer for light, medium, and heavy, with cleaner error and response handling.
• Simplified generated controller error flows so validation, not-found, and internal errors go through a unified response path.
• Streamlined API route registration through AppModules to reduce router sprawl as generated modules grow.
• Hardened generator regression coverage for scaffold common-layer and routing changes.
• Kept extra-light minimal and did not introduce new capabilities in this release.