fix(streamable-http): fail request when resumable SSE stream can't complete #3147

Job	Run time
checks / readme-snippets	11s
checks / docs	42s
checks / pre-commit	25s
checks / test (3.10, lowest-direct, ubuntu-latest)	49s
checks / test (3.10, locked, windows-latest)	1m 28s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 1s
checks / test (3.10, lowest-direct, windows-latest)	1m 42s
checks / test (3.11, lowest-direct, windows-latest)	1m 31s
checks / test (3.12, locked, ubuntu-latest)	1m 8s
checks / test (3.10, locked, ubuntu-latest)	1m 0s
checks / test (3.12, lowest-direct, windows-latest)	1m 38s
checks / test (3.11, locked, ubuntu-latest)	58s
checks / test (3.12, locked, windows-latest)	1m 43s
checks / test (3.12, lowest-direct, ubuntu-latest)	52s
checks / test (3.11, locked, windows-latest)	1m 36s
checks / test (3.13, locked, windows-latest)	1m 38s
checks / test (3.14, lowest-direct, windows-latest)	1m 28s
checks / test (3.13, locked, ubuntu-latest)	58s
checks / test (3.14, lowest-direct, ubuntu-latest)	53s
checks / test (3.14, locked, ubuntu-latest)	1m 59s
checks / test (3.13, lowest-direct, ubuntu-latest)	59s
checks / test (3.13, lowest-direct, windows-latest)	1m 46s
checks / test (3.14, locked, windows-latest)	2m 20s
all-green	5s
	28m 50s

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