All dependency errors, whether they are 4xx or 5xx,
are currently being considered as a 5xx error in parent
jobs. This is causing some of the build alerts to fire
off when a depsolve job has failed, for example, when
in reality, this is an expected result. This commit
ensures that dependency errors are being reported as
4xx status in monitoring.
This commit introduces the collection of error
metrics since it is now possible to differentiate
between internal errors and user input errors.
Additionally, the error status is reported for
job duration metrics.
Define worker errors to give more structured
error messages. The error api is:
id: VALIDATION_ERROR_NUMBER, reason: STRING, details: { issues: [{...}, {...}] }
The api was agreed upon with osbuild so that,
in future, osbuild errors will share the same
structure
