feat: add feedback API

[xremming]

Continues the work from #1033.

I personally need this feature so though I might as well finish the partial PR. Largely done together with Claude.

Splitted the change of the type field from a String to en enum into its own commit. Based on my investigations, the whole type field is not actually needed.

Issues

• Resolves Implementing a capture_feedback function #743

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[xremming]

Tested to be working.

[xremming]

@szokeasaurusrex Since you had reviewed the previous PR would you be the correct person to ping?