working on todo.md features

src/export.hpp

@@ -54,6 +54,12 @@ struct ExportTable {
 /// model access. In trigger mode nothing is locked: the `EventSnapshot` is immutable.
 ExportTable collect_export(ScopeModel& model, RowSet& rows);
 
+/// The held event as a table, built from the **snapshot** rather than from the rows: a cache of the
+/// acquisition, every channel the event holds, independent of which traces a row happens to show
+/// when the latch lands. The channel names are the model's, in channel order -- the same order the
+/// columns come out in, so `--open` restores the same signals.
+ExportTable event_table(ScopeModel& model, const EventSnapshot& snapshot);
+
 /// Writes a NumPy `.npy` file holding one structured array: `time` and `abs_seconds` as
 /// `<f8`, every signal as `<f4` -- the width the ring actually stores, so the file is
 /// about half the size of an all-`f8` one and invents no precision.