feat(vercel): Vercel SDK fixes and correct env vars behavior for staging envs #4871

Job	Run time
typecheck / typecheck	5m 26s
sdk-compat / Bun Runtime	2m 1s
sdk-compat / Node.js 22.12 (ubuntu-latest)	1m 54s
sdk-compat / Deno Runtime	2m 1s
sdk-compat / Cloudflare Workers	2m 28s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	1m 56s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	1m 44s
sdk-compat / Node.js 20.20 (ubuntu-latest)	1m 57s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	4m 13s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	3m 24s
units / packages / 🧪 Unit Tests: Packages (1, 1)	8m 27s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	8m 2s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	6m 11s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	3m 5s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	5m 45s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 20s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	6m 2s
units / internal / 🧪 Unit Tests: Internal (1, 8)	6m 19s
units / internal / 🧪 Unit Tests: Internal (5, 8)	4m 2s
units / internal / 🧪 Unit Tests: Internal (4, 8)	5m 44s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 32s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	3m 51s
units / internal / 🧪 Unit Tests: Internal (7, 8)	4m 56s
units / internal / 🧪 Unit Tests: Internal (2, 8)	10m 13s
units / internal / 🧪 Unit Tests: Internal (6, 8)	5m 46s
units / internal / 🧪 Unit Tests: Internal (8, 8)	6m 21s
units / internal / 🧪 Unit Tests: Internal (3, 8)	10m 6s
units / webapp / 📊 Merge Reports	41s
units / packages / 📊 Merge Reports	20s
units / internal / 📊 Merge Reports	20s
	2h 10m 7s

Provide feedback