fix(db-postgres): too many clients already, cannot read properties 'transaction' of undefined #6338
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Description
This PR aims to solve a few misc. issues related to Postgres and HMR.
First, we may have been creating a new connection each time HMR fired. We now re-use existing connections so that connection pools aren't exhausted.
Second, we now track Drizzle initialization across multiple invocations, so that if HMR is triggered, but there was already an operation in flight, Payload will wait for initialization before beginning a new transaction.