Phase 7: notify and send via Apprise (Email + WhatsApp)

The morning briefs go out through the house Apprise API on `.35:8210`: one
brief per boy and one combined brief to Jo and Sam (FR-9, FR-14). The service
names an Apprise tag (`harry_email`, `joanna_whatsapp`, ...) and never holds an
address, a phone number or an SMTP password (AGENTS.md §10 rule 3).

- internal/apprise: keyed and stateless client, tag filtering, and error
  redaction so nothing sensitive reaches a log, a row or a screen.
- internal/brief: builds the per-boy and the combined brief, delivers on email
  and WhatsApp, records every attempt in `notifications` (migration 004 adds
  scope, channel, tag, ok and error) and fails loudly.
- Send panel (§5 screen 4): recipients, channels, an exact preview, Send now,
  plus the Send action on a stored draft (FR-10). The dashboard shows a
  Morning briefs banner and the Sends list.
- POST /notify/morning: the bearer-token endpoint the 6:00am n8n schedule
  calls. 207 when a channel or a scan failed; `dry_run=1` checks the wiring
  without messaging the family.
- scripts/morning-brief.sh: scan both children, then send. It is the n8n job;
  deploy/n8n-morning-brief.json is the ready-to-import workflow (06:00 daily).
- FR-12: a failed scan is never "nothing due" -- the brief says so, and the run
  exits non-zero. A failed delivery is recorded with no sent_at.
- The long no-due-date tail is capped in the sent brief so it stays brief
  (§10 rule 6); overdue work is never capped.

Verified live: 8 deliveries recorded (4 email, 4 WhatsApp) with HTTP 200 and
sent_at, and the endpoint answers 401/200/207 as documented. Evidence in
docs/phase-7-notify-notes.md.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

internal/store/dashboard_test.go

@@ -83,22 +83,22 @@ func TestSummariesRoundTrip(t *testing.T) {
 	if err != nil || id == 0 {
 		t.Fatalf("create: %v id=%d", err, id)
 	}
-	list, err := st.ListSummaries(ctx, 10)
+	list, err := st.RecentNotifications(ctx, 10)
 	if err != nil || len(list) != 1 {
 		t.Fatalf("list: %v len=%d", err, len(list))
 	}
-	if list[0].Recipient != "Harry" || list[0].SentAt != nil {
+	if list[0].Recipient != "Harry" || list[0].SentAt != nil || list[0].Channel != "" {
 		t.Errorf("summary = %+v, want draft for Harry", list[0])
 	}
-	got, err := st.SummaryByID(ctx, id)
+	got, err := st.NotificationByID(ctx, id)
 	if err != nil || got == nil || got.Text != list[0].Text {
 		t.Fatalf("by id: %v %+v", err, got)
 	}
-	n, err := st.DeleteSummary(ctx, id)
+	n, err := st.DeleteNotification(ctx, id)
 	if err != nil || n != 1 {
 		t.Fatalf("delete = %d, %v", n, err)
 	}
-	if got, _ := st.SummaryByID(ctx, id); got != nil {
+	if got, _ := st.NotificationByID(ctx, id); got != nil {
 		t.Error("summary survived delete")
 	}
 }