fix: filter out doses from previous schedules in SharedSchedule (#88)

- Add updatedAt field to share API response
- Add isDoseFromPreviousSchedule check in SharedSchedule
- Don't count doses scheduled before medication update as missed
- Syncs SharedSchedule behavior with main app's AppContext logic

frontend/src/types/index.ts

@@ -130,6 +130,7 @@ export type SharedMedication = {
 	takenBy: string[];
 	blisters: Blister[];
 	dismissedUntil?: string | null;
+	updatedAt?: string | number | null; // For filtering out doses from previous schedule configurations
 };
 
 export type SharedScheduleData = {