Generate PDFs from Power Test Records

[jb3]

Feature

Allows for the export of PDFs, similar to how Risk Assessments can be exported, but for power test records from events.

This generates a two page document, the first page comprising of high level event detail such as:

• Power MIC
• Event date
• Power Test time
• Venue
• Generator use (from RA)
• Powering other companies (from RA)

The second page contains all the inputted values from the power test plan in a format similar to the HTML version.

Review status of the results is reflected on the first page, the table containing worst points scales depending on how many are inputted/stored.

Future Improvements

Speaking with Nick today in future it might be nice to expand power test records more with:

• Tracking the user who created the power test record/adding a field to select the crew member who performed the tests
• Allowing for multiple power test records to be attached to one event (e.g. for different venues/electrical environments)

Miscellaneous

This PR also fixes the fact that exported PDFs never had a total number of pages, it would always say something like "Page 2 of 0", adding a <namedString> fixes this, we previously had a reference to this namedString but it didn't exist so the default of 0 was used.

[nickw29]

Looks good thanks @jb3 , I think maybe there's a bit of discussion to be had about what else we think would be useful to show and refine the content as we probably also want stuff like event size on there but it's an excellent starting point

[jb3]

Thanks for the review. Will address lint failures shortly.

[jb3]

CI issues now seem to be that the CI builder is trying to setup 3.9 whilst the Pipfile mandates 3.10, I can look at this in another PR but the linting issues are passing locally.

[jerbzz]

Ugh the CI and tests have been broken for a while. If you have the time and energy to look at it that would be awesome 🤩