bigjools / spinach / 37736583607

90%

master: 91%

Pull #1

github

Add a Postgres broker

Jobs live in Postgres. Engine.join_transaction inserts them on the
caller's open transaction, so application rows and job rows commit or
roll back together.

PostgresBroker runs queues, future jobs, periodic tasks, concurrency
limits, namespaces, broker keepalive, and recovery after a broker dies.
A joined connection must be the same cluster, database, and Spinach
tables as the broker. Startup checks schema version 1, column shape,
the position and idempotency defaults, and sslmode=verify-full.

Co-authored-by: Julian Edwards <bigjools@gmail.com>

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