Number of user-authored rows stored, including local-only commands.
Counts USER and SKILL rows. A /skill invocation mounts a SKILL row
instead of a USER row, so each skill turn contributes exactly one;
everything else (ASSISTANT, TOOL, APP, ERROR, ...) is excluded.
This counts stored transcript rows, not server turns: it spans the whole
store rather than the rendered window (visible_count), and it includes
local-only flows such as !shell and most slash commands, which mount a
UserMessage without ever invoking the server. It is therefore a broader
population than the "conversation turns" the offload report derives from
graph state, which counts only non-internal HumanMessages the model
actually saw. Do not converge the two -- they answer different questions.
