You open the dashboard at 08:10 and the nightly summary column is empty, yet every job in the run history is green. Nothing paged, nothing failed, and forty thousand rows sit there with "summary": "" in them. You already know the shape of the answer before you finish scrolling: the pipeline did not crash, it gave up one item at a time and then reported success.

The timeline below is a reconstructed worked example rather than one company's log, so treat the clock as a template to fill in with your own timestamps. The code is the part that reproduces, and the ranking of contributing factors is the part worth arguing about with your team.…