ACME-4012: Epic for Inventory Service reliability improvement 12

Date: 2025-09-11 Type: Epic Priority: P3 Service: Inventory Service Owner: Supply Platform GitHub References: GH-4012, GH-4013 API References: API-INVENTORY-01, API-INVENTORY-02, API-INVENTORY-03, API-INVENTORY-04

Business Context

Acme Commerce depends on the Inventory Service to protect customer trust during high-volume shopping periods. This ticket captures engineering work needed after operational reviews found risk from partial deploy where only half of the pods received new configuration.

Scope

• Review service contract behavior against API-INVENTORY-01.
• Update dashboards and alerts owned by Supply 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-4012, GH-4013.

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.