chore(release): v1.38.3 — delete from the phone, name every source

The account-deletion fix landed after v1.38.2 was tagged, so its entry
moves out of that section and into this one where it belongs. Also in
this release: every measurement source carries a display name in all
seven languages, with a test that reads the enums out of the schema.

docs/api/openapi.yaml

@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: HealthLog API
-  version: 1.38.2
+  version: 1.38.3
   description: >-
     Self-hosted personal-health-tracking PWA — public API surface for the iOS native client and external ingest.