I would probably adapt a slightly different strategy/structure... probably using a git repository with markdown files and a mix of front-matter and TS with a DSL library for rules processing.

The cold storage is a combination of directory structures and markdown files with appropriate front-matter. This could then be queryable directly, or via normalization into a database that represents the same data. By being markdown, you can write rules/policies in a longer/legalize format that Management/HR and Employees can read and understand... port to web layouts for looking at and searching while having a structure that is reasonably developer friendly... the relationships would be similar, but each entity would be represented with a markdown file with its' own front matter and references to other documents.

Just my own thoughts on this.