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benoit 8d6b8502b6 cluster_has_replica: fix the way a healthy replica is detected
For patroni >= version 3.0.4:
* the role is `replica` or `sync_standby`
* the state is `streaming` or `in archive recovery`
* the timeline is the same as the leader
* the lag is lower or equal to `max_lag`

For prio versions of patroni:
* the role is `replica` or `sync_standby`
* the state is `running`
* the timeline is the same as the leader
* the lag is lower or equal to `max_lag`

Additionnally, we now display the timeline in the perfstats. We also try
to display the perf stats of unhealthy replica as much as possible.

Update tests for cluster_has_replica:
* Fix the tests to make them work with the new algotithm
* Add a specific test for tl divergences
2023-11-11 10:50:35 +01:00