Ask HN: Referencing documents and emails in a knowledge base?

In my team we frequently copy and paste information from Google Docs, Jira and Slack to our knowledge base in order to make it searchable and reference it in other documents. We would often copy snippets of text, add a link to the source and a timestamp. We tried switching to Notion but it didn't allow us to reference external documents and it's too generic for issue tracking.

Is there a better way to do that? We are doing that mainly for meeting notes, important technical conversations on Slack or when receiving feedback about something we are working on.