chore(release): stamp 1.16.10 into the OpenAPI info block

The generator reads the package version; the bump landed after the
last regeneration, so CI's drift gate caught the stale stamp.

docs/api/openapi.yaml

@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: HealthLog API
-  version: 1.16.9
+  version: 1.16.10
   description: >-
     Self-hosted personal-health-tracking PWA — public API surface for the iOS native client and external ingest.