feat: add smolmachines/egress_apply proxying docker backend

bot_bottle/backend/smolmachines/egress_apply.py

@@ -0,0 +1,21 @@
+"""Egress apply for the smolmachines backend.
+
+The smolmachines sidecar bundle runs as a host-side Docker container,
+so egress signalling is identical to the docker backend.
+"""
+
+from __future__ import annotations
+
+from ..docker.egress_apply import (  # noqa: F401
+    EgressApplyError,
+    apply_routes_change,
+    fetch_current_routes,
+    validate_routes_content,
+)
+
+__all__ = [
+    "EgressApplyError",
+    "apply_routes_change",
+    "fetch_current_routes",
+    "validate_routes_content",
+]