Kegan Dougal 8be09840d0 Add SYNCV3_MAX_DB_CONN: use it in e2e tests ...

This is designed to catch a class of SQL transaction bugs where
we BEGIN a transaction and then forget to use that `txn` var, and
do other things on `sql.DB` which will use a different connection.

By testing with max conns = 1 this will deadlock. We also test with
max conns = 2 to try to catch more pernicious failure modes. Using
max conns = 1 effectively serialises access to the database, but
some bugs may only be apparent when there is some limited amount
of concurrency available e.g mid-processing this event, do X. With
max conns = 1 we cannot test this, which is why we also test with
max conns = 2.

2023-07-12 17:10:47 +01:00

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Add SYNCV3_MAX_DB_CONN: use it in e2e tests

2023-07-12 17:10:47 +01:00

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2023-03-28 12:07:11 +01:00