feat(api): Ensure chunk metadata is being stored in the DB

[gphorvath]

User Story

As a user
I want annotations
So that know what part of the file was use

Acceptance Criteria

Given [a state]
When [an action is taken]
Then [something happens]

Additional context

To accomplish this we need to ensure the chunk metadata is saved in the data for later use.

[andrewrisse]

@gphorvath Is this part of #766 and should it be a standlone story? or can we close it as a dup

[gregclark-defenseunicorns]

Closing. If there is something that needs to be in the DB then open a new issue