feat(sdk,core): close resumed chat streams promptly when caught up #8842

Job	Run time
Detect changes	12s
code-quality / code-quality	4s
packages / 🧪 Unit Tests: Packages (3, 3)	25s
typecheck / typecheck	13s
packages / 🧪 Unit Tests: Packages (1, 3)	18s
e2e / 🧪 CLI v3 tests (warp-ubuntu-latest-x64-4x - pnpm)	31s
sdk-compat / Deno Runtime	25s
sdk-compat / Cloudflare Workers	25s
internal / 🧪 Unit Tests: Internal	29s
sdk-compat / Node.js 24.18 (warp-ubuntu-latest-x64-4x)	11s
webapp / 🧪 Unit Tests: Webapp (1, 12)	12s
webapp / 🧪 Unit Tests: Webapp (7, 12)	9s
webapp / 🧪 Unit Tests: Webapp (4, 12)	8s
webapp / 🧪 Unit Tests: Webapp (6, 12)	10s
webapp / 🧪 Unit Tests: Webapp (11, 12)	9s
webapp / 🧪 Unit Tests: Webapp (12, 12)	8s
sdk-compat / Bun Runtime	23s
webapp / 🧪 Unit Tests: Webapp (9, 12)	9s
webapp / 🧪 Unit Tests: Webapp (3, 12)	10s
e2e / 🧪 CLI v3 tests (warp-ubuntu-latest-x64-4x - npm)	28s
runops-guard / runops-guard	8s
e2e / 🧪 CLI v3 tests (warp-windows-latest-x64-8x - pnpm)	29s
sdk-compat / Node.js 22.23 (warp-ubuntu-latest-x64-4x)	29s
webapp / 🧪 Unit Tests: Webapp (10, 12)	8s
e2e / 🧪 CLI v3 tests (warp-windows-latest-x64-8x - npm)	21s
webapp / 🧪 Unit Tests: Webapp (2, 12)	28s
sdk-compat / Node.js 20.20 (warp-ubuntu-latest-x64-4x)	29s
sdk-compat / Node.js 26.4 (warp-ubuntu-latest-x64-4x)	29s
packages / 🧪 Unit Tests: Packages (2, 3)	26s
webapp / 🧪 Unit Tests: Webapp (5, 12)	29s
webapp / 🧪 Unit Tests: Webapp (8, 12)	28s
e2e-webapp / 🧪 E2E Tests: Webapp	9s
packages / 📊 Merge Reports	1s
webapp / 📊 Merge Reports	1s
All PR Checks	5s
	9m 59s

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