The fix for  issue 804372  avoids a crash during SoM dispatch if the requested build does not exist.  This could silently hide misconfiguration issues or other exception cases.

Since SoM is an important service, it's worthwhile ensure that alerts are always generated, but there still should be some reporting process so that failures can be analyzed.

Options:
- Generate a SoM alert internally in the case of failures.
- Add a SoM alert which notices failure on the som-dispatcher build and fail the build (while still generating alerts when possible)
- Add a metric indicating failures and have alerts generated through Viceroy.