build(deps): validate single-kernel lib PITR fix via archive URL

Temporarily consume the single-kernel library from the archive URL of
the fix branch (canonical/postgresql-single-kernel-library#179) instead
of the released 16.3.2 wheel, so CI can validate the get_member_status
RetryError fix against the PITR integration tests before the lib is
re-released.

The lib fix stops an uncaught RetryError from crashing the restore
action hook during PITR restore (Patroni intentionally stopped), which
was discarding the staged restore-status result and exhausting the
test's 10x retry loop in test_backups_pitr_{aws,gcp}. This pin should
revert to the released version once the lib fix ships.

Signed-off-by: Marcelo Henrique Neppel <marcelo.neppel@canonical.com>

Author: marceloneppel

poetry.lock

@@ -21,7 +21,7 @@ charm-refresh = "^3.1.0.2"
 charmlibs-snap = "^1.0.1"
 charmlibs-systemd = "^1.0.0.post0"
 charmlibs-interfaces-tls-certificates = "^1.8.3"
-postgresql-charms-single-kernel = {extras = ["postgresql", "vm"], version = "16.3.2"}
+postgresql-charms-single-kernel = {extras = ["postgresql", "vm"], url = "https://github.com/canonical/postgresql-single-kernel-library/archive/5851e4e8686ec86345470635de7112d0ca81157d.tar.gz"}
 
 [tool.poetry.group.charm-libs.dependencies]
 # data_platform_libs/v0/data_interfaces.py