fix(notifications): drop the four switches nothing sends

The notification matrix listed "Unusual measurement", "Low adherence",
"Withings sync failed" and "Personal record" with a switch per channel,
three of them on by default, yet nothing dispatches any of them: a reading
far outside its range or a week of missed doses produced no message.

eventTypesForRole now leaves them out for every role, next to the
admin-only filter, and the preferences read no longer serves rows stored
for them. Their labels in all locales and their tap targets are deleted.
The types stay in EVENT_TYPES, so the preference write and the stored rows
keep parsing; no migration.

The label and tap-target tests walked EVENT_TYPES and so pinned the four
in place; they now walk the event types that are sent.

src/__tests__/baselines/version-stamp-comments.json

@@ -2606,7 +2606,7 @@
     "lib/notifications/senders/telegram.ts": 4,
     "lib/notifications/senders/web-push.ts": 5,
     "lib/notifications/senders/webhook.ts": 1,
-    "lib/notifications/types.ts": 21,
+    "lib/notifications/types.ts": 20,
     "lib/notifications/web-push-clear.ts": 1,
     "lib/nutrients/__tests__/catalog.test.ts": 1,
     "lib/nutrients/catalog.ts": 8,