Fix SSE double-wrapping bug when returning pre-formatted Response (#1661)#1663

raunak-rpm wants to merge 4 commits intoelysiajs:mainelysiajs/elysia:mainfrom

raunak-rpm:fix/sse-double-wrappingraunak-rpm/elysia-repo:fix/sse-double-wrappingCopy head branch name to clipboard