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Marc-André Bombeck
6ac3a61829
A GET must not have side effects — api-handler.ts says so next to READ_HTTP_METHODS, where an MCP-audience token is admitted on the safe methods precisely because they are assumed to write nothing. Three routes broke that: the sync handshake bumped User.lastSyncedAt, the achievements read inserted unlock rows, and the cycle calendar fired a discarded promise at the forecast cache so a failed write left no trace anywhere. Each write moves to the place that causes it. The sync checkpoint is now stamped by the batch ingest endpoints for measurements, mood and intakes. The handshake reports it. That also fixes the watermark: the checkpoint used to advance past a window the client had not drained, and a client trusting it would skip that window. It can only trail a real sync now. The unlock rows move to a nightly achievement-unlock-sweep. The badge grid never needed them — unlocked comes from the live metrics and the completion date is derived — so the payload is unchanged; the rows pin that date and carry it into the backup, and the sweep reaches accounts that never open the page. The cycle forecast moves to a nightly cycle-prediction-refresh. The CyclePrediction row is not a cache of a read: it is the index the reminder cron scans, so which reminders an account received depended on whether somebody had opened the calendar. persistPredictionCache no longer swallows its errors either — the job reports them.