Session store cloud queries repeatedly time out

Session store searches keep timing out against the cloud backend even when local results work, wasting time on retries before the agent falls back; it should use local data sooner or make cloud queries reliable

Start by reproducing session store searches against the cloud backend and compare them with local results. Trace the timeout and retry behavior; done means cloud queries are reliable or local data is used sooner without repeated wasted retries.

Written by the indexing model from the issue text.