chore(release): v1.16.16 — one engine for sleep, recovery and glucose

Read sleep, recovery and blood glucose from a single source on every surface —
dashboard, coach, doctor-report, CSV and FHIR exports, and the companion app —
so the displayed figure agrees wherever it appears. Sleep nights reconstruct
once with source de-duplication; WHOOP-native recovery is canonical and resolves
to one row per night; glucose converts to the user's unit at the point it is
served. Hardens the consent receipt path and deepens WHOOP sync with per-resource
cursors, targeted refresh and full backfill. Several displayed numbers become
correct-but-different — flagged in the changelog.

docs/api/openapi.yaml

@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: HealthLog API
-  version: 1.16.15
+  version: 1.16.16
   description: >-
     Self-hosted personal-health-tracking PWA — public API surface for the iOS native client and external ingest.