Workflow report: no indication that datasets included via `invocation_outputs` are trimmed

These have all been trimmed to 5 lines but this isn't mentioned or shown anywhere as far as I can see which can be very misleading for a report's reader.


Start by tracing how workflow reports render datasets included through invocation_outputs, then inspect where their contents are trimmed. Done when the report clearly indicates that these datasets are limited to five lines, with coverage for the changed behavior.

Written by the indexing model from the issue text.