chore(release): v1.28.53 — a Today overview at the top of the dashboard

Bundles the daily-digest spine (a single server-built digest read from the
overnight insight cache, never a fresh generation) and the Today hero that
surfaces it: the health score with an honest provisional/finalised face, the
day's lead read, and a short worth-a-look rail of one-tap items. The tiles and
charts stay below, unchanged. The Today hero takes the promoted slot when
Insights is on, so it never stacks with the legacy opt-in hero.

This is the shared foundation the later daily surfaces (morning refresh, an
optional daily note) build on — one digest, one card model, one design language.

docs/api/openapi.yaml

@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: HealthLog API
-  version: 1.28.52
+  version: 1.28.53
   description: >-
     Self-hosted personal-health-tracking PWA — public API surface for the iOS native client and external ingest.