Cherry-pick: perf(sdk): load the SSE transport with the first SSE session - #940

Cherry-pick: perf(sdk): load the SSE transport with the first SSE session#940

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perf/1.10.x-lazy-optional-deps-cherry-pick-mainagentfront/frontmcp:perf/1.10.x-lazy-optional-deps-cherry-pick-mainfrom

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