fix(cli): hotswap ECS flags result in SerializationException: STRING_VALUE cannot be converted to Integer

[dysosmus]

The PR #417 introduced extra hotswap flags. However, when used the flags yield serialisation errors like bellow because the expected type is a number not a string.

failed: SerializationException: STRING_VALUE cannot be converted to Integer

This PR changes hotswap-ecs-minimum-healthy-percent, hotswap-ecs-maximum-healthy-percent, and hotswap-ecs-stabilization-timeout-seconds from string to expected type number type.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.72%. Comparing base (4813f35) to head (742fe10).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #973   +/-   ##
=======================================
  Coverage   87.72%   87.72%           
=======================================
  Files          72       72           
  Lines       10077    10077           
  Branches     1327     1327           
=======================================
  Hits         8840     8840           
  Misses       1212     1212           
  Partials       25       25           

Flag	Coverage Δ
suite.unit	87.72% <100.00%> (ø)

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[mrgrain]

Build is failing and really we should have a test case here demonstrating the error is fixed.