feat: update HTTP server write timeout to 5 seconds

[terencehonles]

This change updates the HTTP server's write timeout to 5 seconds to ensure the exporters have enough time to write their output.

[terencehonles]

@jaqx0r 1 second was a little too short for both the JSON and prometheus exporters for some logs I was testing against. It looks like 2 seconds would have been fine, but I figured bumping up to 5 wasn't a problem. If you think this should be a command line argument I can propose that change instead.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.52%. Comparing base (dd0f4da) to head (06d5ac8).
Report is 229 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #908      +/-   ##
==========================================
+ Coverage   56.76%   57.52%   +0.76%     
==========================================
  Files          66       68       +2     
  Lines        6923     6908      -15     
==========================================
+ Hits         3930     3974      +44     
+ Misses       2724     2669      -55     
+ Partials      269      265       -4     

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[jaqx0r]

Thanks! I don't think we need a flag for it.

This might help with #903 though I suspect the root cause there is iterating over the entire store.