fix(apple-health): count readings entered here before calling a type quiet (#1247)

Weight, blood pressure and blood glucose are written back to the phone
while their entry is bidirectional. A reading entered here goes to Apple
Health and never arrives back, so a person who keeps those readings here
saw the type go quiet after two weeks. The Apple Health status read now
adds `lastEnteredHereAt` to each written-back type, the newest reading
from any source other than Apple Health, and `stale` counts it; the card
shows it as "Last entered here". The value is resolved on the server so a
client renders it as sent.

docs/api/openapi.yaml

@@ -76528,6 +76528,17 @@ components:
               format: date-time
               pattern: ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d(?:\.\d+)?(?:Z|([+-](?:[01]\d|2[0-3]):[0-5]\d)))$
             - type: "null"
+        lastEnteredHereAt:
+          description: "v1.43.7 — present only on a type the app writes back to Apple Health (weight, blood pressure, blood
+            glucose while their entry is `bidirectional` or `writeOnly` and enabled): when the newest reading of the
+            type was entered here rather than arriving from Apple Health, or null when none was. Such readings go to the
+            phone and never come back as an arrival, so `stale` already counts them: the type is quiet only when both
+            this and `lastSeenAt` are. Show it as the server sends it; do not recompute `stale`."
+          anyOf:
+            - type: string
+              format: date-time
+              pattern: ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d(?:\.\d+)?(?:Z|([+-](?:[01]\d|2[0-3]):[0-5]\d)))$
+            - type: "null"
       required:
         - type
         - lastSeenAt