Fix/resolve plain text

[BaloMueller]

Description

For Plaintext or Markdown files the proper way to resolve them is .get_media() instead of .export().

How Has This Been Tested?

Manual tests on my machine

Accepted Risk

None

Related Issue(s)

None yet

Checklist:

• All of the automated tests pass
• All PR comments are addressed and marked resolved
• If there are migrations, they have been rebased to latest main
• If there are new dependencies, they are added to the requirements
• If there are new environment variables, they are added to all of the deployment methods
• If there are new APIs that don't require auth, they are added to PUBLIC_ENDPOINT_SPECS
• Docker images build and basic functionalities work
• Author has done a final read through of the PR right before merge

[vercel]

Someone is attempting to deploy a commit to the Danswer Team on Vercel.

A member of the Team first needs to authorize it.