fix/AGIPD_CM_processing_issue_redmine_#75266

SUMMARY:

This MR is related to a det-support Redmine ticket https://in.xfel.eu/redmine/issues/75266?jump=issues. There were some reporter errors in the Data Processing Sections in the report for sequences 13, 20, and 52.

I understood that these errors occurred for images with fewer n_imgs than its preceding processed core (while applying cm_correction()) and the same value of trainIds was stored at the end of the shared_mem array.

Error's Screenshot:

Reviewers

@danilevc @kamile @kluyvert