feat(worker): S2 proaktiva puffar (expiring-ingredient)

- Ny notification_type 'proactive_tip' och consent_kind 'notifications'.
- Dubbelgrind: personalization + notifications samtycke måste vara granted.
- Mallbaserade pufftexter i 12 språk; ingen fri AI-text.
- Led med nyttan ('gurkan börjar bli slapp — recept du brukar gilla').
- Max 1 puff/hushåll/dag; ingen upprepning av samma vara+recept inom 7 dagar.
- UTC för all datummatte; createdAt sätts explicit från processorns now.
- Ny worker-jobbtyp SEND_PROACTIVE_TIPS.
- Integrationstester för dubbelgrind, revoke, frekvens, duplicate, UTC.
- Migration 0022 + worker test script kör db:test-setup.

packages/shared-types/src/enums.ts

@@ -503,6 +503,8 @@ export const CONSENT_KINDS = [
   "health_integration",
   "location_weather",
   "push_notifications",
+  /** In-app notifications (proactive tips etc.) – separate from push. */
+  "notifications",
   /** Product analytics – legitimate interest with opt-out (spec §8, §33). */
   "product_analytics",
 ] as const;
@@ -568,6 +570,7 @@ export const NOTIFICATION_TYPES = [
   "week_plan_change",
   "pantry_forecast",
   "subscription_status",
+  "proactive_tip",
 ] as const;
 export type NotificationType = (typeof NOTIFICATION_TYPES)[number];