DPE-7726: Log Patroni start/stop/restart (to undestand charm behavior)

Author: taurus-forever

src/cluster.py

@@ -781,6 +781,7 @@ def start_patroni(self) -> bool:
             Whether the service started successfully.
         """
         try:
+            logger.debug("Starting Patroni...")
             cache = snap.SnapCache()
             selected_snap = cache["charmed-postgresql"]
             selected_snap.start(services=["patroni"])
@@ -800,6 +801,7 @@ def patroni_logs(self, num_lines: int | str | None = 10) -> str:
             Multi-line logs string.
         """
         try:
+            logger.debug("Getting Patroni logs...")
             cache = snap.SnapCache()
             selected_snap = cache["charmed-postgresql"]
             # Lib definition of num_lines only allows int
@@ -836,6 +838,7 @@ def stop_patroni(self) -> bool:
             Whether the service stopped successfully.
         """
         try:
+            logger.debug("Stopping Patroni...")
             cache = snap.SnapCache()
             selected_snap = cache["charmed-postgresql"]
             selected_snap.stop(services=["patroni"])
@@ -1054,6 +1057,7 @@ def restart_patroni(self) -> bool:
             Whether the service restarted successfully.
         """
         try:
+            logger.debug("Restarting Patroni...")
             cache = snap.SnapCache()
             selected_snap = cache["charmed-postgresql"]
             selected_snap.restart(services=["patroni"])