feat(sdk): AI SDK chat transport — run useChat as tasks #4720

Job	Run time
typecheck / typecheck	6m 26s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	4m 21s
sdk-compat / Deno Runtime	2m 26s
sdk-compat / Bun Runtime	2m 14s
sdk-compat / Node.js 22.12 (ubuntu-latest)	2m 23s
units / packages / 🧪 Unit Tests: Packages (1, 1)	8m 23s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	1m 46s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	1m 42s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	3m 40s
sdk-compat / Node.js 20.20 (ubuntu-latest)	2m 9s
sdk-compat / Cloudflare Workers	2m 24s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	5m 58s
units / internal / 🧪 Unit Tests: Internal (4, 8)	5m 37s
units / internal / 🧪 Unit Tests: Internal (5, 8)	4m 1s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 25s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	3m 57s
units / internal / 🧪 Unit Tests: Internal (1, 8)	5m 53s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	7m 52s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	3m 20s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	6m 0s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	5m 40s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 36s
units / internal / 🧪 Unit Tests: Internal (6, 8)	5m 0s
units / internal / 🧪 Unit Tests: Internal (2, 8)	9m 17s
units / internal / 🧪 Unit Tests: Internal (7, 8)	5m 35s
units / internal / 🧪 Unit Tests: Internal (8, 8)	3m 37s
units / internal / 🧪 Unit Tests: Internal (3, 8)	6m 40s
units / webapp / 📊 Merge Reports	49s
units / packages / 📊 Merge Reports	23s
units / internal / 📊 Merge Reports	1s
	2h 4m 35s

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