providing feedback through the UI fails

[peterj]

When doing 👍🏼 and sending feedback to the backend.

Error submitting feedback: Error: Failed to create feedback: failed to upsert model: SQL logic error: ON CONFLICT clause does not match any PRIMARY KEY or UNIQUE constraint (1)
    at fetchApi (utils.ts:85:11)
    at  submitFeedback (feedback.ts:19:12)
    at  submitPositiveFeedback (feedback.ts:38:12)
    at resolveErrorDev (react-server-dom-turbopack-client.browser.development.js:2324:46)
    at processFullStringRow (react-server-dom-turbopack-client.browser.development.js:2810:23)
    at processFullBinaryRow (react-server-dom-turbopack-client.browser.development.js:2753:7)
    at processBinaryChunk (react-server-dom-turbopack-client.browser.development.js:2956:15)
    at progress (react-server-dom-turbopack-client.browser.development.js:3220:13)
error @ intercept-console-error.ts:44

[killjoycircuit]

@peterj feedback submission fails because the Feedback struct marks both gorm.Model.ID and UserID as primaryKey, which creates an invalid composite key for the upsert (ON CONFLICT) logic.

we could remove the primaryKey tag from UserID and use db.Create() instead of save() in StoreFeedback(), since each feedback entry should be a new record.