Check-patroni

Fixed

* cluster_has_replica now properly accounts for standby leaders (72, reported by MLyssens)

Misc

* Update the tests and the documentation to reflect that master is replaced by
primary everywhere it's visible in Patroni. We didn't use the term so there
is nothing to change in our code.

Notice

While fixing `cluster_has_replica`, the definition of a healthy replica was
changed. It's more restrictive now, hence the jump from v1 to v2.

Changed

* In `cluster_node_count`, a healthy standby, sync replica or standby leaders cannot be "in
archive recovery" because this service doesn't check for lag and timelines.

Added

* Add the timeline in the `cluster_has_replica` perfstats. (50)
* Add a mention about shell completion support and shell versions in the doc. (53)
* Add the leader type and whether it's archiving to the `cluster_has_leader` perfstats. (58)

Fixed

* Add compatibility with [requests](https://requests.readthedocs.io)
version 2.25 and higher.
* Fix what `cluster_has_replica` deems a healthy replica. (50, reported by mbanck)
* Fix `cluster_has_replica` to display perfstats for replicas whenever it's possible (healthy or not). (50)
* Fix `cluster_has_leader` to correctly check for standby leaders. (58, reported by mbanck)
* Fix `cluster_node_count` to correctly manage replication states. (50, reported by mbanck)

Misc

* Improve the documentation for `node_is_replica`.
* Improve test coverage by running an HTTP server to fake the Patroni API (55
by dlax).
* Work around old pytest versions in type annotations in the test suite.
* Declare compatibility with click version 7.1 (or higher).
* In tests, work around nagiosplugin 1.3.2 not properly handling stdout
redirection.

Check patroni is now tagged as Production/Stable.

Added

* Add `sync_standby` as a valid replica type for `cluster_has_replica`. (contributed by mattpoel)
* Add info and options (`--sync-warning` and `--sync-critical`) about sync replica to `cluster_has_replica`.
* Add a new service `cluster_has_scheduled_action` to warn of any scheduled switchover or restart.
* Add options to `node_is_replica` to check specifically for a synchronous (`--is-sync`) or asynchronous node (`--is-async`).
* Add `standby-leader` as a valid leader type for `cluster_has_leader`.
* Add a new service `node_is_leader` to check if a node is a leader (which includes standby leader nodes)

Fixed

* Fix the `node_is_alive` check. (31)
* Fix the `cluster_has_replica` and `cluster_node_count` checks to account for
the new replica state `streaming` introduced in v3.0.4 (28, reported by log1-c)

Misc

* Create CHANGELOG.md
* Add tests for the output of the scripts in addition to the return code
* Documentation in CONTRIBUTING.md

Added

* Add a `--save` option when state files are used
* Modify `-e/--endpoints` to allow a comma separated list of endpoints (21, reported by lihnjo)
* Use requests instead of urllib3 (with extensive help from dlax)
* Change the way logging is handled (with extensive help from dlax)

Fix

* Reverse the test for `node_is_pending`
* SSL handling

Misc

* Several doc Fix and Updates
* Use spellcheck and isort
* Remove tests for python 3.6
* Add python tests for python 3.11

The initial release covers the following checks :

* check a cluster for
+ configuration change
+ presence of a leader
+ presence of a replica
+ maintenance status
* check a node for
+ liveness
+ pending restart status
+ primary status
+ replica status
+ tl change
+ patroni version