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TEST: Harden Copilot allocation cancellation observation #7769

Job	Run time
Frontend Lint & Type Check	59s
Frontend E2E (mock, shard 2/2)	13m 49s
Frontend E2E (mock, shard 1/2)	11m 4s
Frontend Unit Tests & Coverage	4m 9s
Frontend E2E (seeded, shard 1/1)	12m 7s
Frontend E2E Tests	46s
	42m 54s