[Bugfix]: Fix streaming "connection closed" before body consumed in orchestrated disaggregated routing (#960)

* issues/952: fix streaming connection closed before body consumed in orchestrated disaggregated routing

Signed-off-by: shoreline2 <shoreline2@users.noreply.github.com>

* Ensure response is released in failure scenarios

Signed-off-by: shoreline2 <shoreline2@users.noreply.github.com>

* Address pre-commit ruff check

Signed-off-by: shoreline2 <shoreline2@users.noreply.github.com>

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Signed-off-by: shoreline2 <shoreline2@users.noreply.github.com>
Co-authored-by: shoreline2 <shoreline2@users.noreply.github.com>
Co-authored-by: Rui Zhang <51696593+ruizhang0101@users.noreply.github.com>