Intify search limit if set

[kofalt]

The search size param would never succeed if set, because URL params are strings.

[nagem]

LGTM

[codecov-io]

Codecov Report

Merging #947 into master will decrease coverage by 0.04%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master    #947      +/-   ##
=========================================
- Coverage   90.14%   90.1%   -0.05%     
=========================================
  Files          48      48              
  Lines        6462    6465       +3     
=========================================
  Hits         5825    5825              
- Misses        637     640       +3

Flag	Coverage Δ
#python	90.1% <0%> (-0.05%)	⬇️

Impacted Files	Coverage Δ
api/handlers/dataexplorerhandler.py	83.66% <0%> (-1.02%)	⬇️

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