Previously, the node events chore would select based on the earliest
created_at. However, if for some reason this batch fails, it would still
be the next item to select. If there is a consistent error, the chore
would be stuck retrying the same batch over and over. Now instead
GetNextBatch orders by `last_attempted NULLS FIRST ASC, created_at ASC`.
If a batch fails during Notify, last_attempted is updated so we can move
on to a new batch if one exists.
Change-Id: Ia8458e05ac358d85b2f2c6d690f3d607d631be61
read one is the wrong method when trying to select one row when there
are multiple. It returns TooManyRows error. Read first is the correct
method.
Change-Id: Ic6c92795486892ac041befd118b6945314bffeaa
Implement node events DB with Insert and GetLatestByEmailAndEvent. Get
was changed to GetLatestByEmailAndEvent so we can verify items are being
inserted into the table without needing the ID, which is not available
to us in the tests.
Change-Id: I4abe63631c44774cd7e795fbab0cbab4d801db4c
