investigate if dap file is limited

It appears to have 10k rows in it exactly, which suggests either that the original file is cut short or we are cutting it short.

Start by locating the DAP file and checking whether it contains exactly 10,000 rows. Compare it with the original source or the process that produces it to determine whether the source is truncated or the repository's handling is limiting the file; done means identifying the cause and documenting the relevant evidence.

Written by the indexing model from the issue text.