fix: update watchdog if no email are forwarded

imap2imap.py

@@ -107,6 +107,8 @@ def run(self) -> None:
                 )
                 sleep_time += random_delta
 
+            self.watchdog = time()
+
             self.log.debug("Waiting %.2f seconds...", sleep_time)
             self.exit_event.wait(sleep_time)
         self.log.info("Exited")
@@ -195,7 +197,7 @@ def forward(self, src_imap_config, dest_imap_config):
                 counter_failure += 1
                 self.log.error("Failed to forward message %s", msg_id)
 
-            # Update watchdog for each message processed to avoid timeout for large mailboxes
+            # Update watchdog also for each message processed to avoid timeout for large mailboxes
             self.watchdog = time()
 
         self.src_imap.expunge()