more direct interpretation of "warned" status, like "failed" and independently of "finished", e.g. relevant for Rendering.overview_color of aux. files where main command status is unavailable (amending 0546e036d1c0);

simplified Text.Chunk -- eliminated ooddities; afford strict symbol_index, which is usually empty anyway;

tuned;

more frugal Symbol.Index -- no need to waste space on mostly empty arrays;

accumulate markup reports for "other" command ids, which are later retargeted and merged for rendering (in erratic order);

avoid data redundancy;