Flatten undefined properties correctly #3125

Job	Run time
typecheck / typecheck	5m 19s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	2m 27s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	4m 40s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	2m 17s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	5m 15s
units / packages / 🧪 Unit Tests: Packages (1, 1)	3m 25s
units / webapp / 🧪 Unit Tests: Webapp (1, 10)	2m 27s
units / webapp / 🧪 Unit Tests: Webapp (4, 10)	2m 8s
units / webapp / 🧪 Unit Tests: Webapp (2, 10)	2m 12s
units / internal / 🧪 Unit Tests: Internal (6, 8)	3m 57s
units / webapp / 🧪 Unit Tests: Webapp (8, 10)	3m 16s
units / webapp / 🧪 Unit Tests: Webapp (3, 10)	2m 49s
units / webapp / 🧪 Unit Tests: Webapp (7, 10)	11m 41s
units / internal / 🧪 Unit Tests: Internal (1, 8)	6m 6s
units / internal / 🧪 Unit Tests: Internal (5, 8)	3m 23s
units / internal / 🧪 Unit Tests: Internal (4, 8)	4m 42s
units / internal / 🧪 Unit Tests: Internal (3, 8)	3m 54s
units / webapp / 🧪 Unit Tests: Webapp (5, 10)	4m 58s
units / webapp / 🧪 Unit Tests: Webapp (9, 10)	2m 10s
units / webapp / 🧪 Unit Tests: Webapp (10, 10)	2m 10s
units / internal / 🧪 Unit Tests: Internal (8, 8)	2m 22s
units / webapp / 🧪 Unit Tests: Webapp (6, 10)	3m 5s
units / internal / 🧪 Unit Tests: Internal (7, 8)	4m 57s
units / internal / 🧪 Unit Tests: Internal (2, 8)	4m 28s
units / packages / 📊 Merge Reports	46s
units / internal / 📊 Merge Reports	25s
units / webapp / 📊 Merge Reports	20s
	1h 35m 39s

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