fix(sdk): preserve partial assistant message on chat stream failure (… #3486

Job	Run time
units / packages / 🧪 Unit Tests: Packages (1, 3)	3m 37s
typecheck / typecheck	3m 4s
units / packages / 🧪 Unit Tests: Packages (2, 3)	3m 15s
units / e2e-webapp / 🧪 E2E Tests: Webapp	4m 4s
units / internal / 🧪 Unit Tests: Internal	7m 17s
units / webapp / 🧪 Unit Tests: Webapp (5, 12)	7m 32s
units / webapp / 🧪 Unit Tests: Webapp (3, 12)	7m 10s
units / webapp / 🧪 Unit Tests: Webapp (8, 12)	7m 10s
units / webapp / 🧪 Unit Tests: Webapp (12, 12)	7m 14s
units / webapp / 🧪 Unit Tests: Webapp (6, 12)	6m 49s
units / webapp / 🧪 Unit Tests: Webapp (9, 12)	7m 27s
units / webapp / 🧪 Unit Tests: Webapp (10, 12)	7m 4s
units / packages / 🧪 Unit Tests: Packages (3, 3)	4m 37s
units / webapp / 🧪 Unit Tests: Webapp (7, 12)	7m 2s
units / webapp / 🧪 Unit Tests: Webapp (4, 12)	7m 16s
units / webapp / 🧪 Unit Tests: Webapp (11, 12)	7m 11s
units / webapp / 🧪 Unit Tests: Webapp (1, 12)	7m 15s
units / webapp / 🧪 Unit Tests: Webapp (2, 12)	6m 58s
publish-webapp / publish	5m 50s
publish-worker-v4 / build (supervisor)	2m 31s
units / packages / 📊 Merge Reports	15s
scan-supervisor / Scan	29s
units / webapp / 📊 Merge Reports	22s
📣 Dispatch main image	6s
scan-webapp / Scan	1m 2s
	2h 2m 37s

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