db: Handle null external service failure messages

Created by: ryanslade

Created by: sourcegraph-bot

Notifying subscribers in CODENOTIFY files for diff 190718815407ef4238b56a119bb6c8d04d07a406...d3d1923dc948b3f66b4342ebf9cee364ffa24633.

Notify	File(s)
@LawnGnome	internal/db/external_services.go internal/db/external_services_test.go
@asdine	internal/db/external_services.go internal/db/external_services_test.go
@efritz	internal/db/basestore/rows.go
@eseliger	internal/db/external_services.go internal/db/external_services_test.go

Created by: codecov[bot]

Codecov Report

Merging #16884 (d3d1923) into main (e10a004) will decrease coverage by 0.00%. The diff coverage is 10.00%.

@@            Coverage Diff             @@
##             main   #16884      +/-   ##
==========================================
- Coverage   52.30%   52.30%   -0.01%     
==========================================
  Files        1699     1699              
  Lines       83996    84005       +9     
  Branches     7686     7686              
==========================================
+ Hits        43933    43935       +2     
- Misses      36191    36199       +8     
+ Partials     3872     3871       -1     

Flag	Coverage Δ		*Carryforward flag
go	51.40% <10.00%> (-0.01%)
integration	29.69% <ø> (ø)		Carriedforward from e10a004
storybook	28.74% <ø> (ø)		Carriedforward from e10a004
typescript	54.40% <ø> (ø)		Carriedforward from e10a004
unit	35.04% <ø> (ø)		Carriedforward from e10a004

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

Impacted Files	Coverage Δ
internal/db/basestore/rows.go	1.56% <0.00%> (-0.26%)
internal/db/external_services.go	66.75% <100.00%> (ø)
.../internal/codeintel/resolvers/graphql/locations.go	85.56% <0.00%> (+2.06%)