ACME-5001: Epic for Notification Service reliability improvement 01

Date: 2026-04-08 Type: Epic Priority: P1 Service: Notification Service Owner: Engagement Platform GitHub References: GH-5001, GH-5002 API References: API-NOTIFICATION-01, API-NOTIFICATION-02, API-NOTIFICATION-03, API-NOTIFICATION-04

Business Context

Acme Commerce depends on the Notification Service to protect customer trust during high-volume shopping periods. This ticket captures engineering work needed after operational reviews found risk from background job lag after batch import exceeded expected cardinality.

Scope

• Review service contract behavior against API-NOTIFICATION-02.
• Update dashboards and alerts owned by Engagement Platform.
• Coordinate rollout with the teams that operate Authentication Service, Checkout Service, Billing Service, Inventory Service, and Notification Service.
• Link implementation work to GitHub items GH-5001, GH-5002.

Definition of Done

• Tests cover nominal, timeout, replay, and malformed payload scenarios.
• Runbook steps are updated and validated in staging.
• Incident review owners can cite this ticket as remediation evidence.