Fixes BARAAA-64 DB migration and auth issues:
- Update tsconfig.build.json to compile scripts/migrate.ts (was excluded)
- Create entrypoint.sh to run migrations before server start
- Update Dockerfile to build migrate.ts and use migration entrypoint
- Expose postgres port 15432 temporarily for password diagnosis
This ensures tables are created before app starts and allows connecting
to postgres from host to diagnose 28P01 auth errors.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
