Revert "Revert "GSR Revamp""

[vcai122]

Reverts #236

[codecov]

Codecov Report

Attention: 25 lines in your changes are missing coverage. Please review.

Comparison is base (d5bbcda) 89.87% compared to head (f10f69d) 91.22%.

Files	Patch %	Lines
backend/gsr_booking/api_wrapper.py	86.59%	24 Missing ⚠️
backend/gsr_booking/models.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #237      +/-   ##
==========================================
+ Coverage   89.87%   91.22%   +1.35%     
==========================================
  Files          59       58       -1     
  Lines        2549     2417     -132     
==========================================
- Hits         2291     2205      -86     
+ Misses        258      212      -46     

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