Build HR Database Webservice

I already have an HR data model (an artefact generated in Claude) and I now need it turned into a working PostgreSQL database that can be accessed through a web-based service.

Here is what I expect:

• Translate the existing artefact into a clean PostgreSQL schema, including tables, keys, indexes, and basic seed data where useful.
• Wrap that schema with a REST (or GraphQL if you recommend it) web service so it is accessible to internal tools and future integrations.
• Core modules must cover employee management, document storage tied to each employee record, and an automatic fill-in feature that merges employee data into contract drafts and other mandatory documents.
• Secure the service with straightforward username-and-password authentication; design the user table and hashed-password workflow accordingly.
• Provide clear API documentation and an ERD so future developers can extend the system easily.
• Deliver the source code, database scripts, and a brief setup guide that lets me run everything locally and deploy to a typical cloud host.

I’m comfortable with mainstream frameworks (Django, Flask, Express, FastAPI, etc.) so choose the stack you can move fastest with, as long as PostgreSQL remains the database. Clean, well-commented code and concise docs will be the key acceptance criteria.