Fix SQL type error for webhooks

[ethantkoenig]

HookQueue contains strings, and we forget to convert the string to an int. As a result, webhooks are not properly fired (at least for MySQL, not sure about other RDBMSs)

[codecov-io]

Codecov Report

Merging #3424 into master will decrease coverage by 0.01%.
The diff coverage is 62.5%.

@@            Coverage Diff            @@
##           master   #3424      +/-   ##
=========================================
- Coverage   35.61%   35.6%   -0.02%     
=========================================
  Files         281     281              
  Lines       40589   40593       +4     
=========================================
- Hits        14457   14452       -5     
- Misses      23995   24001       +6     
- Partials     2137    2140       +3

Impacted Files	Coverage Δ
models/webhook.go	67.02% <62.5%> (-0.46%)	⬇️
modules/process/manager.go	76.81% <0%> (-4.35%)	⬇️
models/repo.go	42.98% <0%> (-0.19%)	⬇️

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