fix(cache): mark measurement caches stale after every bulk write

Closed analytics blocks survive a write that says it reached no further
back, so a writer that never invalidated left them on their pre-write
values. The Apple Health and Health Connect imports, the CSV and JSON
imports, the score engines, the WHOOP webhook, the Withings activity, sleep
and ECG legs, the Oura history backfill and the sleep-segment sweep wrote
measurements without touching the read caches; a long-history import
showed the old all-time figures until the entries aged out.

The shared post-mutation tail now marks the caches stale back to the
oldest row it is handed, and the Withings and Oura legs that hand-rolled
the same tail run through it. The two export imports share one tail that
refolds the rollups, marks the caches stale back to the oldest sample
written (all of them when none was) and re-warms the status assessments.
A sweep that tombstones a sleep segment drops every cached block.

src/__tests__/baselines/source-function-lines.json

@@ -1,7 +1,7 @@
 {
   "$comment": "Production functions over 200 lines, keyed \"file :: name\", and their length. Maintained by src/__tests__/source-size-ratchet.test.ts.",
   "count": 411,
-  "total": 148324,
+  "total": 148227,
   "entries": {
     "app/achievements/page.tsx :: AchievementsPage": 206,
     "app/api/admin/backups/upload/route.ts :: apiHandler(arg)": 314,
@@ -350,7 +350,7 @@
     "lib/insights/weight-status.ts :: prepareWeightStatusForUser": 598,
     "lib/integrations/connection-health-load.ts :: loadConnectionFacts": 227,
     "lib/integrations/status.ts :: recordSyncFailure": 292,
-    "lib/jobs/apple-health-import-worker.ts :: handleAppleHealthImport": 357,
+    "lib/jobs/apple-health-import-worker.ts :: handleAppleHealthImport": 300,
     "lib/jobs/coach-nudge.ts :: findTriggerForUser": 279,
     "lib/jobs/coach-nudge.ts :: runCoachNudgeTick": 292,
     "lib/jobs/coach-reminder-sweep.ts :: runCoachReminderSweep": 222,
@@ -409,9 +409,9 @@
     "lib/targets/vitals-builder.ts :: buildVitalTargets": 324,
     "lib/telegram-webhook-handlers.ts :: handleCallback": 599,
     "lib/telegram-webhook-handlers.ts :: handleTextMessage": 337,
-    "lib/withings/sync-activity.ts :: syncUserActivity": 391,
-    "lib/withings/sync-ecg.ts :: syncUserEcg": 213,
-    "lib/withings/sync-sleep.ts :: syncUserSleep": 429,
+    "lib/withings/sync-activity.ts :: syncUserActivity": 377,
+    "lib/withings/sync-ecg.ts :: syncUserEcg": 202,
+    "lib/withings/sync-sleep.ts :: syncUserSleep": 414,
     "lib/withings/sync.ts :: syncUserMeasurements": 373,
     "proxy.ts :: proxy": 499
   }