A&R-> Can edit "Historical" records as a SysAdmin through Review Data page

When a SubArea of a park marked as "Historical" the option add new data or editing existing data is disabled from the "Enter Data" page.

If you are a SysAdmin, then there is a workaround to edit existing records through the "Review Data" page.

**This scenario has to be run through the client and decided if this is needed to be fixed or not.**

Sceanrio:
* Navigate to the A&R on TEST environment as a SysAdmin user
* Find a park with SubAreas marked as Historical. (Eg: Goldpan park)
* Navigate to the Review Data page and filter by the above selected park and sub area.
* Find a year where there is a variance record. (2023 August)
* Click on the option to review the variance -> Should navigate to the Enter data view of the record.
* Edit the record and save the changes.

Expected:
* The expected behaviour has to be confirmed from the client.

Issue:
* It is possible to edit historical records if there is a variance triggered in any month/year.

Refer to the video below;

https://github.com/user-attachments/assets/2cff3a40-b638-452f-9c37-086e15e82be2

Reproduce the scenario in the Review Data page using a SysAdmin account, a Historical subarea such as Goldpan, and the August 2023 variance record, then follow the link into the Enter Data view. First confirm the intended behavior with the client; done means the confirmed rule is consistently enforced when reviewing and saving historical records.

Written by the indexing model from the issue text.