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Marc-André Bombeck
98e078d359
Hotfix on top of v1.4.37. The post-deploy verify caught /api/analytics cold-mount hits of ~62 s and parallel /api/health checks of ~58 s on the live instance, far above the v1.4.37 1.5-3 s perf claim. Root cause: the synchronous ensureUserRollupsFresh(userId) call at the top of each heavy read path folds the trailing 90-day DAY window when the rollup watermark trails the newest measurement. On a power-user account whose iOS step samples push the watermark every few minutes, each cache miss synchronously paid the full refresh cost on a Node worker that also serves the rest of the request fan-out (including /api/health, /api/version, and concurrent iOS calls), and the event loop was blocked for the duration of the recompute. Convert the three call sites (analytics route, comprehensive aggregator, summaries slice) to fire-and-forget. The downstream probeRollupCoverage gate falls back to live SQL on partial coverage so correctness is preserved; the only user-observable change is one cache window of staleness on the very first request after a new measurement landed.