fix(api): prevent null idempotency keys in responses, only undefined … #2823

Job	Run time
typecheck / typecheck	6m 6s
units / internal / 🧪 Unit Tests: Internal (3, 8)	5m 23s
units / packages / 🧪 Unit Tests: Packages (1, 1)	8m 8s
units / internal / 🧪 Unit Tests: Internal (6, 8)	4m 15s
units / internal / 🧪 Unit Tests: Internal (4, 8)	5m 9s
units / internal / 🧪 Unit Tests: Internal (1, 8)	6m 6s
units / internal / 🧪 Unit Tests: Internal (8, 8)	2m 57s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	5m 43s
units / internal / 🧪 Unit Tests: Internal (5, 8)	4m 12s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	3m 15s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	4m 20s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	7m 35s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 38s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 0s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	6m 32s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	5m 54s
units / internal / 🧪 Unit Tests: Internal (2, 8)	9m 27s
units / internal / 🧪 Unit Tests: Internal (7, 8)	4m 56s
publish-worker-v4 / build (supervisor)	2m 51s
publish-worker / build (docker-provider)	1m 6s
publish-webapp / publish	7m 24s
publish-worker / build (coordinator)	1m 48s
publish-worker / build (kubernetes-provider)	1m 2s
units / webapp / 📊 Merge Reports	54s
units / packages / 📊 Merge Reports	22s
units / internal / 📊 Merge Reports	25s
	1h 52m 28s

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