feat: Limit scheduler start and end time correctly

[iamareebjamal]

Fixes #4788

[vercel]

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[codecov]

Codecov Report

Merging #4789 into development will decrease coverage by 0.07%.
The diff coverage is 48.00%.

@@               Coverage Diff               @@
##           development    #4789      +/-   ##
===============================================
- Coverage        23.23%   23.16%   -0.08%     
===============================================
  Files              480      480              
  Lines             5039     5051      +12     
  Branches             9       14       +5     
===============================================
- Hits              1171     1170       -1     
- Misses            3867     3879      +12     
- Partials             1        2       +1     

Impacted Files	Coverage Δ
app/models/event.js	53.84% <ø> (ø)
app/models/session.js	10.00% <ø> (ø)
app/models/speaker.js	0.00% <ø> (ø)
app/components/schedule.ts	48.00% <48.00%> (ø)

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