c05ae786fc
Adjusts the order cancellation endpoint to correctly handle admin overrides for completed/cancelled orders and updates associated tests to expect 409 status codes reflecting Task #80's changes. Replit-Commit-Author: Agent Replit-Commit-Session-Id: 77cfe984-2c65-4152-bb7a-0df28274fe66 Replit-Commit-Checkpoint-Type: full_checkpoint Replit-Commit-Event-Id: d358e7e1-8a16-4746-86aa-4f1739233f2e Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/c3c252e4-c83d-40ca-9fff-99a3ea60701e/77cfe984-2c65-4152-bb7a-0df28274fe66/3E2mNig Replit-Helium-Checkpoint-Created: true