TetHistoryTask

`construct.tet.history`: the kept solves of a tet volume, and a pin that keeps one (field-presentation §FVO-2, §FVE-11, matrix FVW-74).

In the namespace construct::opal. Declared in src/libs/libconstruct/construct/opal/SolveHistoryTasks.hpp.

Detailed description

Returns each kept solve, the oldest first: its index, field-set hash, time, setup hash, summary, whether it is pinned, whether it is the current solve and whether its file is available. `pin` and `unpin` take an index, a hash or `current`; each is one undo step, the edit of Tet ▸ Keep this solve.