chore: use ctx background when calling webhook async

[bthari]

Context

When trying to call a webhook within an API call, the context that usually will be passed is request context. Issue is, this context will expire when the client API call is done (either by timeout, cancel, or finished process), therefore when calling the async webhook with NewRequestWithContext it might produce an error because the request will not wait for aync call, as it's called in another go routine.

To mitigate this issue, the async webhook call will use context.Background() instead.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.39%. Comparing base (83f620d) to head (62758aa).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #115   +/-   ##
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  Coverage   56.39%   56.39%           
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  Files          48       48           
  Lines        2477     2477           
=======================================
  Hits         1397     1397           
  Misses        884      884           
  Partials      196      196           

Flag	Coverage Δ
api-test	56.39% <ø> (ø)

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[deadlycoconuts]

LGTM! Thanks for finding out about this problem!