v4: dequeue performance improvements (split concurrency from dequeue) #2910

Job	Run time
typecheck / typecheck	4m 56s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	2m 20s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	5m 56s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	5m 11s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	2m 33s
units / webapp / 🧪 Unit Tests: Webapp (1, 10)	2m 3s
units / packages / 🧪 Unit Tests: Packages (1, 1)	3m 14s
units / webapp / 🧪 Unit Tests: Webapp (4, 10)	5m 5s
units / webapp / 🧪 Unit Tests: Webapp (3, 10)	2m 40s
units / webapp / 🧪 Unit Tests: Webapp (2, 10)	2m 10s
units / webapp / 🧪 Unit Tests: Webapp (6, 10)	6m 10s
units / webapp / 🧪 Unit Tests: Webapp (5, 10)	2m 49s
units / webapp / 🧪 Unit Tests: Webapp (8, 10)	2m 14s
units / internal / 🧪 Unit Tests: Internal (1, 8)	3m 53s
units / webapp / 🧪 Unit Tests: Webapp (7, 10)	2m 21s
units / webapp / 🧪 Unit Tests: Webapp (10, 10)	2m 8s
units / internal / 🧪 Unit Tests: Internal (4, 8)	4m 0s
units / internal / 🧪 Unit Tests: Internal (6, 8)	3m 16s
units / internal / 🧪 Unit Tests: Internal (3, 8)	3m 18s
units / internal / 🧪 Unit Tests: Internal (2, 8)	3m 56s
units / internal / 🧪 Unit Tests: Internal (5, 8)	3m 45s
units / webapp / 🧪 Unit Tests: Webapp (9, 10)	2m 22s
units / internal / 🧪 Unit Tests: Internal (8, 8)	1m 52s
units / internal / 🧪 Unit Tests: Internal (7, 8)	3m 55s
units / packages / 📊 Merge Reports	21s
units / internal / 📊 Merge Reports	22s
units / webapp / 📊 Merge Reports	20s
	1h 23m 10s

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