Read 2D chemistry probe species after locating the probe #2065

In the 2D branch of s_write_probe_files the species partial densities
were read from q_cons_vf(j-2, k-2, l) before j, k and l were computed
for the current probe and outside the ownership check, so they used the
previous probe's cell or, for the first probe, uninitialized indices.
A gfortran debug run of a 2D chemistry case with probes aborted on an
out-of-bounds index.

Move the read inside the ownership branch after the indices are set,
as in the 1D and 3D branches.

A fix for this is already written. The pull request was closed only to reduce the number of simultaneously open PRs from this author, not because the work was rejected or found incorrect.

• Closed PR: Read 2D chemistry probe species after locating the probe #1989
• Branch: fix/2d-chem-probe-indices on the sbryngelson fork, at 8381419e38
• Reopening needs no force-push and no rebase: gh pr reopen 1989 -R MFlowCode/MFC

Tracked with the pr-to-do label so the whole set is discoverable together.

Filed with Claude Code.