[#43] added ML end point for stats

[Samuel-Campbell]

1) Updated readme with new GET 2) Added GET method --> /statistics

[codecov[bot]]

Codecov Report

Merging #388 into master will increase coverage by 0.07%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #388      +/-   ##
==========================================
+ Coverage   67.57%   67.65%   +0.07%     
==========================================
  Files          51       51              
  Lines        2085     2090       +5     
  Branches       17       17              
==========================================
+ Hits         1409     1414       +5     
  Misses        671      671              
  Partials        5        5

Impacted Files	Coverage Δ
src/ml_service/web/ml_controller.py	61.66% <100%> (+3.48%)	:arrow_up:

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[TaimoorRana]

Looks good