feat: Implement task and reward tracking feature

- Added tracking events for tasks, penalties, and rewards with timestamps.
- Created new TinyDB table for tracking records to maintain audit history.
- Developed backend API for querying tracking events with filters and pagination.
- Implemented logging for tracking events with per-user rotating log files.
- Added unit tests for tracking event creation, querying, and anonymization.
- Deferred frontend changes for future implementation.
- Established acceptance criteria and documentation for the tracking feature.

feat: Introduce account deletion scheduler

- Implemented a scheduler to delete accounts marked for deletion after a configurable threshold.
- Added new fields to the User model to manage deletion status and attempts.
- Created admin API endpoints for managing deletion thresholds and viewing the deletion queue.
- Integrated error handling and logging for the deletion process.
- Developed unit tests for the deletion scheduler and related API endpoints.
- Documented the deletion process and acceptance criteria.

frontend/vue-app/src/common/models.ts

@@ -93,6 +93,7 @@ export interface Event {
     | ChildRewardsSetEventPayload
     | TaskModifiedEventPayload
     | RewardModifiedEventPayload
+    | TrackingEventCreatedPayload
 }
 
 export interface ChildModifiedEventPayload {
@@ -135,3 +136,45 @@ export interface RewardModifiedEventPayload {
   reward_id: string
   operation: 'ADD' | 'DELETE' | 'EDIT'
 }
+
+export interface TrackingEventCreatedPayload {
+  tracking_event_id: string
+  child_id: string
+  entity_type: EntityType
+  action: ActionType
+}
+
+export type EntityType = 'task' | 'reward' | 'penalty'
+export type ActionType = 'activated' | 'requested' | 'redeemed' | 'cancelled'
+
+export interface TrackingEvent {
+  id: string
+  user_id: string | null
+  child_id: string
+  entity_type: EntityType
+  entity_id: string
+  action: ActionType
+  points_before: number
+  points_after: number
+  delta: number
+  occurred_at: string
+  created_at: number
+  updated_at: number
+  metadata?: Record<string, any> | null
+}
+
+export const TRACKING_EVENT_FIELDS = [
+  'id',
+  'user_id',
+  'child_id',
+  'entity_type',
+  'entity_id',
+  'action',
+  'points_before',
+  'points_after',
+  'delta',
+  'occurred_at',
+  'created_at',
+  'updated_at',
+  'metadata',
+] as const