Only take reconciled changesets into consideration when calculating events

Created by: eseliger

This fixes a bug where calculation would fail because ExternalCreatedAt is null, because it could not be synced initially. I think this makes sense, as we won't have consistent data before it's reconciled anyways, but please let's discuss!

Created by: codecov[bot]

Codecov Report

Merging #14521 into main will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main   #14521   +/-   ##
=======================================
  Coverage   52.21%   52.22%           
=======================================
  Files        1556     1556           
  Lines       79150    79155    +5     
  Branches     6947     6947           
=======================================
+ Hits        41330    41336    +6     
+ Misses      34084    34083    -1     
  Partials     3736     3736           

Flag	Coverage Δ		*Carryforward flag
#go	52.54% <100.00%> (+<0.01%)
#integration	30.79% <ø> (ø)		Carriedforward from a6543af
#storybook	22.02% <ø> (ø)		Carriedforward from a6543af
#typescript	51.44% <ø> (ø)		Carriedforward from a6543af
#unit	33.23% <ø> (ø)		Carriedforward from a6543af

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
...nterprise/internal/campaigns/resolvers/campaign.go	78.37% <100.00%> (+0.60%)
enterprise/internal/campaigns/store_changesets.go	83.43% <100.00%> (+0.10%)
internal/db/helpers.go	100.00% <0.00%> (ø)
internal/gosrc/stdlib.go	100.00% <0.00%> (ø)
internal/conf/platform.go	100.00% <0.00%> (ø)
internal/routevar/util.go	100.00% <0.00%> (ø)
internal/timeutil/week.go	100.00% <0.00%> (ø)
internal/vcs/git/mocks.go	100.00% <0.00%> (ø)
internal/db/query/query.go	100.00% <0.00%> (ø)
internal/highlight/mocks.go	100.00% <0.00%> (ø)
... and 765 more