Results by treatment specialty not showing in the downloadable outputs report

[matt-dray]

Figures seem not to be generated for results split by treatment specialty.

Noted in https://github.com/The-Strategy-Unit/nhp_planning/issues/441#issuecomment-3377028800.

For example: Activity in detail > Inpatients > Non-elective admission > Bed days by treatment specialty

This output is generated in the outputs app, however, so check if this is an issue in the reports code.

[yiwen-h]

@yiwen-h to check if these downloadable reports are required for "refresh"

[yiwen-h]

Have checked - still not known at present but the functionality to be able to download outputs app for a snapshot of model results including metadata is valuable - something that we anticipate having to continuously support