540eb73bcf
Agent.#runLoop appends the user batch and a synthetic stopReason: "error" assistant turn to state.messages before resolving prompt() with state.error set. AdvisorRuntime now snapshots state.messages.length before each prompt, restores it on failure (via a new AdvisorAgent.rollbackTo hook that also resets the advisor's append-only sync cursor), and clears state.error so retries replay a clean baseline and the drop-after-3 path never leaks orphan failed turns into the next successful run's context. Fixes #3635