fix(sftp): Avoid using wait_for_logs in module. (#995)

This fixes bug #994.

---------

Co-authored-by: Jan Koprowski <jan.koprowski@openchip.com>

Author: jankoprowski

modules/sftp/testcontainers/sftp/__init__.py

@@ -20,7 +20,7 @@
 from cryptography.hazmat.primitives.asymmetric import rsa
 
 from testcontainers.core.container import DockerContainer
-from testcontainers.core.waiting_utils import wait_for_logs
+from testcontainers.core.wait_strategies import LogMessageWaitStrategy
 
 if TYPE_CHECKING:
     from typing_extensions import Self
@@ -265,8 +265,9 @@ def _configure(self) -> None:
         self.with_exposed_ports(self.port)
 
     def start(self) -> Self:
+        strategy = LogMessageWaitStrategy(f".*Server listening on 0.0.0.0 port {self.port}.*")
+        self.waiting_for(strategy)
         super().start()
-        wait_for_logs(self, f".*Server listening on 0.0.0.0 port {self.port}.*")
         return self
 
     def get_exposed_sftp_port(self) -> int: