feat: hand the container engine connection Container Station's docker

napalm-device-types 2.6.0 opens a host's container engine through
`open_container_engine()`, and asks the driver for the binary through
`_container_engine_binary()`. Under QTS docker is not on PATH; the hook
now returns the path `open()` already discovers, so the Engine API stream
(`<path> system dial-stdio`) and the CLI reach Container Station while
callers only pass arguments (NetOrk/netork#765).

Version 0.2.0, requires napalm-device-types >= 2.6.0 and
napalm-linux >= 0.2.0.

Refs NAPALM/napalm-device-types#17

napalm_qnap_qts/qnap_qts.py

@@ -154,6 +154,12 @@ class QnapQtsDriver(StorageDriver, HypervisorDriver, LinuxDriver):
         """Override LinuxDriver's hook: docker is not on PATH under QTS."""
         return getattr(self, "_docker_path", None) or "docker"
 
+    def _container_engine_binary(self, engine: str) -> str:
+        """Container Station keeps docker off PATH; callers never see the path."""
+        if engine == "docker":
+            return self._docker_bin()
+        return super()._container_engine_binary(engine)
+
     # ── QPKG, not apt ─────────────────────────────────────────────────────────
     #
     # QTS is Linux, so LinuxDriver's package methods are in the MRO and would