Create absence records on creation of faculty member

[rmainwork]

Creating a new faculty member does not currently populate the absence table. This in turn leads to a white screen of death when trying to access the faculty page.

This PR addresses this issue by adding a Subscriber that listens for the creation of Faculty and adds the appropriate Absence records to match.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] I have run eslint on the code
• [x] I have added JSDoc for all of my code (where applicable)
• [x] I have added tests to cover my changes.

Priority:

• [x] Normal
• [ ] High

Related Issues:

Fixes #620

[codecov[bot]]

Codecov Report

Merging #623 (40f4a28) into develop (a0f7aa5) will increase coverage by 0.00%. The diff coverage is 87.50%.

:exclamation: Current head 40f4a28 differs from pull request most recent head 6962b1f. Consider uploading reports for the commit 6962b1f to get more accurate results

@@           Coverage Diff            @@
##           develop     #623   +/-   ##
========================================
  Coverage    95.24%   95.24%           
========================================
  Files          192      192           
  Lines         4475     4480    +5     
  Branches       541      541           
========================================
+ Hits          4262     4267    +5     
  Misses         100      100           
  Partials       113      113           

Impacted Files	Coverage Δ
src/client/components/layout/AppHeader.tsx	92.00% <ø> (ø)
src/client/components/layout/AppRouter.tsx	82.60% <0.00%> (ø)
.../components/pages/Faculty/FacultyScheduleTable.tsx	100.00% <ø> (ø)
src/client/components/pages/FacultyAdmin.tsx	100.00% <ø> (ø)
.../client/components/pages/Schedule/ScheduleView.tsx	94.87% <ø> (ø)
src/server/course/course.service.ts	100.00% <ø> (ø)
src/server/faculty/faculty.controller.ts	97.46% <100.00%> (+0.17%)	:arrow_up:

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[rmainwork]

Yay, thanks!