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ea94a9c088
The existing runtime_checkpoint mechanism preserves the in-flight assistant/tool state if the process dies mid-turn, but the triggering user message is only written to session history at the end of the turn via _save_turn(). If the worker is killed (OOM, SIGKILL, a self- triggered systemctl restart, container eviction, etc.) before the turn completes, the user's message is silently lost: on restart, the session log only shows the interrupted assistant turn without any record of what the user asked. Any recovery tooling built on top of session logs cannot reply because it has no prompt to reply to. This patch appends the incoming user message to the session and flushes it to disk immediately after the session is loaded and before the agent loop runs, then adjusts the _save_turn skip offset so the final persistence step does not duplicate it. Limited to textual content (isinstance(msg.content, str)); list-shaped content (media blocks) still flows through _save_turn's sanitization at end of turn, preserving existing behavior for those cases.