## Background

This is level 3 of 5 and continues the work of the earlier levels. The new files for this level are in `workspace/t3/`. The records from the start are in `workspace/t1/`, and the earlier results are in `workspace/t1/results/` to `workspace/t2/results/`.

## Task

Hi,

Stewardship is ready to refresh the publications behind the accepted records. I have sent the later Teleflex report and the next Caterpillar report, with its PDF runs and supporting release. After the refresh the database needs a migration we can review and a publication history people can actually use.

Please hand over the runnable migration candidate in workspace/t3/results/migration/ and the change journal at workspace/t3/results/change-journal.xlsx. Carry forward the accepted population from workspace/t1/results/debt-load.xlsx and the Caterpillar records from workspace/t2/results/qualification.xlsx. Within that scope, account for the comparatives that changed and the ones that were retained, add the new periods and give engineering the revised controls. Where a value changes, make clear what changes in the stored record and what happens to its earlier publication.

Build the migration component on top of the adapter you handed over, so that it regenerates the journal from the accepted inputs and the new source delivery. Qualify the new PDF acquisition and the supplied extraction routes alongside the earlier qualification. Package the accepted inputs with the candidate so engineering can rerun this themselves. Include the numerical regression outcome with the journal, and for each change record what kind of change it is, as we usually do, so engineering knows what it is implementing in the refresh. The financing relationships we already accepted should keep their original source history.

Thanks,
Leah

## Input

- `workspace/t1/`: the records supplied with the work (`dqc_us_rules/`, `edgar/`, `extraction-runs/`, `operations/`, `pandas/`, `pdfplumber/`, `reference/`).
- `workspace/t2/`: the files that came with level t2 (`edgar/`, `engineering/`, `extraction-runs/`, `operations/`).
- `workspace/t3/`: the files that came with level t3 (`edgar/`, `extraction-runs/`, `operations/`).
- `workspace/t1/results/`: the results of level t1.
- `workspace/t2/results/`: the results of level t2.

## Output

- `workspace/t3/results/change-journal.xlsx`
- `workspace/t3/results/migration`