Allow permissions & notes on fasttrack question pages

[axlewin]

IsaacFastTrackQuestionPage extends IsaacQuestionPage without defining a new constructor, so Jackson uses the default constructor which takes no arguments and doesn't know about permissions or notes. Therefore these fields need getters/setters in SeguePage.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 37.28%. Comparing base (e2a11e6) to head (4a975e0).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
.../uk/ac/cam/cl/dtg/isaac/dos/content/SeguePage.java	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #729      +/-   ##
==========================================
- Coverage   37.29%   37.28%   -0.01%     
==========================================
  Files         536      536              
  Lines       23726    23732       +6     
  Branches     2861     2861              
==========================================
  Hits         8849     8849              
- Misses      13995    14001       +6     
  Partials      882      882              

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[sjd210]

Makes sense 👍