Describe threat intelligence

https://pedia.altinn.cloud/sec/security-architecture/security-operations/threat-intel/ (or pages referred to from this page) should be updated with information on how Altinn collects generic and specific threat intelligence.

Once approved, relevant parts should be migrated from pedia to docs.

Start with the threat-intelligence page at the linked pedia URL and follow the pages it references. Document how Altinn collects generic and specific threat intelligence, then identify the relevant approved content to migrate from pedia to the docs; completion requires approval and migration.

Written by the indexing model from the issue text.