fix(cli): reject execute() immediately when child process is dead #4320

Job	Run time
sdk-compat / Cloudflare Workers	2m 10s
sdk-compat / Deno Runtime	1m 35s
sdk-compat / Node.js 22.12 (ubuntu-latest)	1m 57s
typecheck / typecheck	6m 5s
sdk-compat / Node.js 20.20 (ubuntu-latest)	2m 4s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	3m 40s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	1m 41s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	4m 21s
sdk-compat / Bun Runtime	2m 1s
units / packages / 🧪 Unit Tests: Packages (1, 1)	8m 21s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	1m 51s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	7m 14s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 3s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	6m 12s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	7m 55s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	3m 53s
units / internal / 🧪 Unit Tests: Internal (4, 8)	5m 20s
units / internal / 🧪 Unit Tests: Internal (7, 8)	5m 32s
units / internal / 🧪 Unit Tests: Internal (3, 8)	6m 25s
units / internal / 🧪 Unit Tests: Internal (1, 8)	5m 59s
units / internal / 🧪 Unit Tests: Internal (5, 8)	4m 14s
units / internal / 🧪 Unit Tests: Internal (2, 8)	9m 59s
units / internal / 🧪 Unit Tests: Internal (8, 8)	3m 40s
units / internal / 🧪 Unit Tests: Internal (6, 8)	5m 2s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	5m 29s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 30s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	5m 32s
units / webapp / 📊 Merge Reports	51s
units / packages / 📊 Merge Reports	22s
units / internal / 📊 Merge Reports	18s
	2h 6m 16s

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