insights: default to retrying queries that error

Created by: leonore

closes #37284 (closed)

Test plan

Modified and added unit tests.

Artificially added retryable and non retryable error events in the decoder and observed insights react appropriately:

• observed error message for an insight on a list of repos

• observed error message for a query that will be marked as errored (retryable)

• observed error message for a query that will be marked as failed (non-retryable)