Query history is never persisted — user counter increments but History panel stays empty

[AttiR]

Summary

After a successful query, the per-user rate-limit counter (users.total_queries) increments correctly ("1 of 2 remaining" in the top nav), but the History panel keeps showing "No queries yet" and the cached-replay endpoint GET /api/history/:id cannot find the row.
Net effect: every query a user pays for (Claude call + their rate-limit budget) is lost from the audit log and unreplayable from cache.

Steps to reproduce

1. Sign in with Google on https://insightiq-frontend.orangemeadow-25c8b891.westeurope.azurecontainerapps.io
2. Ask any question (e.g. "What is our MRR?")
3. Wait for the chart + insight to render.
4. Top nav shows the budget badge has decremented (e.g. 1 of 2 remaining).
5. History panel still shows 0 queries — click to load free / No queries yet.
6. SELECT COUNT(*) FROM query_history WHERE user_id = <me> returns 0.

Expected

After step 4, the History panel should list the question with a cached-result indicator, and clicking it should replay from result_json without a Claude call.

Actual

The row is never inserted. The user's rate-limit budget is consumed for nothing.