fix: add .js extensions to shared package imports for Node.js ESM
The shared package was using moduleResolution: "Bundler" which doesn't
add .js extensions to compiled output. Node.js ESM requires explicit
file extensions for relative imports.
Changes:
- Remove moduleResolution and module overrides from shared/tsconfig.json
(now inherits NodeNext from base config) - Add .js extensions to all relative imports in index.ts
This fixes the container crash:
Error [ERR_MODULE_NOT_FOUND]: Cannot find module '.../dist/schemas'